/* * utils for libavcodec * Copyright (c) 2001 Fabrice Bellard * Copyright (c) 2002-2004 Michael Niedermayer * * This file is part of Libav. * * Libav is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * Libav is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** * @file * utils. */ #include "config.h" #include "libavutil/attributes.h" #include "libavutil/avassert.h" #include "libavutil/avstring.h" #include "libavutil/channel_layout.h" #include "libavutil/crc.h" #include "libavutil/frame.h" #include "libavutil/internal.h" #include "libavutil/mathematics.h" #include "libavutil/pixdesc.h" #include "libavutil/imgutils.h" #include "libavutil/samplefmt.h" #include "libavutil/dict.h" #include "avcodec.h" #include "dsputil.h" #include "libavutil/opt.h" #include "thread.h" #include "internal.h" #include "bytestream.h" #include "version.h" #include #include #include #include static int volatile entangled_thread_counter = 0; static int (*lockmgr_cb)(void **mutex, enum AVLockOp op); static void *codec_mutex; static void *avformat_mutex; void *av_fast_realloc(void *ptr, unsigned int *size, size_t min_size) { if (min_size < *size) return ptr; min_size = FFMAX(17 * min_size / 16 + 32, min_size); ptr = av_realloc(ptr, min_size); /* we could set this to the unmodified min_size but this is safer * if the user lost the ptr and uses NULL now */ if (!ptr) min_size = 0; *size = min_size; return ptr; } void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size) { void **p = ptr; if (min_size < *size) return; min_size = FFMAX(17 * min_size / 16 + 32, min_size); av_free(*p); *p = av_malloc(min_size); if (!*p) min_size = 0; *size = min_size; } void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size) { void **p = ptr; if (min_size > SIZE_MAX - FF_INPUT_BUFFER_PADDING_SIZE) { av_freep(p); *size = 0; return; } av_fast_malloc(p, size, min_size + FF_INPUT_BUFFER_PADDING_SIZE); if (*size) memset((uint8_t *)*p + min_size, 0, FF_INPUT_BUFFER_PADDING_SIZE); } /* encoder management */ static AVCodec *first_avcodec = NULL; AVCodec *av_codec_next(const AVCodec *c) { if (c) return c->next; else return first_avcodec; } static av_cold void avcodec_init(void) { static int initialized = 0; if (initialized != 0) return; initialized = 1; if (CONFIG_DSPUTIL) ff_dsputil_static_init(); } int av_codec_is_encoder(const AVCodec *codec) { return codec && (codec->encode_sub || codec->encode2); } int av_codec_is_decoder(const AVCodec *codec) { return codec && codec->decode; } av_cold void avcodec_register(AVCodec *codec) { AVCodec **p; avcodec_init(); p = &first_avcodec; while (*p != NULL) p = &(*p)->next; *p = codec; codec->next = NULL; if (codec->init_static_data) codec->init_static_data(codec); } unsigned avcodec_get_edge_width(void) { return EDGE_WIDTH; } #if FF_API_SET_DIMENSIONS void avcodec_set_dimensions(AVCodecContext *s, int width, int height) { ff_set_dimensions(s, width, height); } #endif int ff_set_dimensions(AVCodecContext *s, int width, int height) { int ret = av_image_check_size(width, height, 0, s); if (ret < 0) width = height = 0; s->width = s->coded_width = width; s->height = s->coded_height = height; return ret; } #if HAVE_NEON || ARCH_PPC || HAVE_MMX # define STRIDE_ALIGN 16 #else # define STRIDE_ALIGN 8 #endif void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height, int linesize_align[AV_NUM_DATA_POINTERS]) { int i; int w_align = 1; int h_align = 1; switch (s->pix_fmt) { case AV_PIX_FMT_YUV420P: case AV_PIX_FMT_YUYV422: case AV_PIX_FMT_UYVY422: case AV_PIX_FMT_YUV422P: case AV_PIX_FMT_YUV440P: case AV_PIX_FMT_YUV444P: case AV_PIX_FMT_GBRP: case AV_PIX_FMT_GRAY8: case AV_PIX_FMT_GRAY16BE: case AV_PIX_FMT_GRAY16LE: case AV_PIX_FMT_YUVJ420P: case AV_PIX_FMT_YUVJ422P: case AV_PIX_FMT_YUVJ440P: case AV_PIX_FMT_YUVJ444P: case AV_PIX_FMT_YUVA420P: case AV_PIX_FMT_YUVA422P: case AV_PIX_FMT_YUVA444P: case AV_PIX_FMT_YUV420P9LE: case AV_PIX_FMT_YUV420P9BE: case AV_PIX_FMT_YUV420P10LE: case AV_PIX_FMT_YUV420P10BE: case AV_PIX_FMT_YUV422P9LE: case AV_PIX_FMT_YUV422P9BE: case AV_PIX_FMT_YUV422P10LE: case AV_PIX_FMT_YUV422P10BE: case AV_PIX_FMT_YUV444P9LE: case AV_PIX_FMT_YUV444P9BE: case AV_PIX_FMT_YUV444P10LE: case AV_PIX_FMT_YUV444P10BE: case AV_PIX_FMT_GBRP9LE: case AV_PIX_FMT_GBRP9BE: case AV_PIX_FMT_GBRP10LE: case AV_PIX_FMT_GBRP10BE: w_align = 16; //FIXME assume 16 pixel per macroblock h_align = 16 * 2; // interlaced needs 2 macroblocks height break; case AV_PIX_FMT_YUV411P: case AV_PIX_FMT_UYYVYY411: w_align = 32; h_align = 8; break; case AV_PIX_FMT_YUV410P: if (s->codec_id == AV_CODEC_ID_SVQ1) { w_align = 64; h_align = 64; } case AV_PIX_FMT_RGB555: if (s->codec_id == AV_CODEC_ID_RPZA) { w_align = 4; h_align = 4; } case AV_PIX_FMT_PAL8: case AV_PIX_FMT_BGR8: case AV_PIX_FMT_RGB8: if (s->codec_id == AV_CODEC_ID_SMC) { w_align = 4; h_align = 4; } break; case AV_PIX_FMT_BGR24: if ((s->codec_id == AV_CODEC_ID_MSZH) || (s->codec_id == AV_CODEC_ID_ZLIB)) { w_align = 4; h_align = 4; } break; default: w_align = 1; h_align = 1; break; } *width = FFALIGN(*width, w_align); *height = FFALIGN(*height, h_align); if (s->codec_id == AV_CODEC_ID_H264) // some of the optimized chroma MC reads one line too much *height += 2; for (i = 0; i < 4; i++) linesize_align[i] = STRIDE_ALIGN; } void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height) { const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(s->pix_fmt); int chroma_shift = desc->log2_chroma_w; int linesize_align[AV_NUM_DATA_POINTERS]; int align; avcodec_align_dimensions2(s, width, height, linesize_align); align = FFMAX(linesize_align[0], linesize_align[3]); linesize_align[1] <<= chroma_shift; linesize_align[2] <<= chroma_shift; align = FFMAX3(align, linesize_align[1], linesize_align[2]); *width = FFALIGN(*width, align); } int avcodec_fill_audio_frame(AVFrame *frame, int nb_channels, enum AVSampleFormat sample_fmt, const uint8_t *buf, int buf_size, int align) { int ch, planar, needed_size, ret = 0; needed_size = av_samples_get_buffer_size(NULL, nb_channels, frame->nb_samples, sample_fmt, align); if (buf_size < needed_size) return AVERROR(EINVAL); planar = av_sample_fmt_is_planar(sample_fmt); if (planar && nb_channels > AV_NUM_DATA_POINTERS) { if (!(frame->extended_data = av_mallocz(nb_channels * sizeof(*frame->extended_data)))) return AVERROR(ENOMEM); } else { frame->extended_data = frame->data; } if ((ret = av_samples_fill_arrays(frame->extended_data, &frame->linesize[0], buf, nb_channels, frame->nb_samples, sample_fmt, align)) < 0) { if (frame->extended_data != frame->data) av_free(frame->extended_data); return ret; } if (frame->extended_data != frame->data) { for (ch = 0; ch < AV_NUM_DATA_POINTERS; ch++) frame->data[ch] = frame->extended_data[ch]; } return ret; } static int update_frame_pool(AVCodecContext *avctx, AVFrame *frame) { FramePool *pool = avctx->internal->pool; int i, ret; switch (avctx->codec_type) { case AVMEDIA_TYPE_VIDEO: { AVPicture picture; int size[4] = { 0 }; int w = frame->width; int h = frame->height; int tmpsize, unaligned; if (pool->format == frame->format && pool->width == frame->width && pool->height == frame->height) return 0; avcodec_align_dimensions2(avctx, &w, &h, pool->stride_align); if (!(avctx->flags & CODEC_FLAG_EMU_EDGE)) { w += EDGE_WIDTH * 2; h += EDGE_WIDTH * 2; } do { // NOTE: do not align linesizes individually, this breaks e.g. assumptions // that linesize[0] == 2*linesize[1] in the MPEG-encoder for 4:2:2 av_image_fill_linesizes(picture.linesize, avctx->pix_fmt, w); // increase alignment of w for next try (rhs gives the lowest bit set in w) w += w & ~(w - 1); unaligned = 0; for (i = 0; i < 4; i++) unaligned |= picture.linesize[i] % pool->stride_align[i]; } while (unaligned); tmpsize = av_image_fill_pointers(picture.data, avctx->pix_fmt, h, NULL, picture.linesize); if (tmpsize < 0) return -1; for (i = 0; i < 3 && picture.data[i + 1]; i++) size[i] = picture.data[i + 1] - picture.data[i]; size[i] = tmpsize - (picture.data[i] - picture.data[0]); for (i = 0; i < 4; i++) { av_buffer_pool_uninit(&pool->pools[i]); pool->linesize[i] = picture.linesize[i]; if (size[i]) { pool->pools[i] = av_buffer_pool_init(size[i] + 16, NULL); if (!pool->pools[i]) { ret = AVERROR(ENOMEM); goto fail; } } } pool->format = frame->format; pool->width = frame->width; pool->height = frame->height; break; } case AVMEDIA_TYPE_AUDIO: { int ch = av_get_channel_layout_nb_channels(frame->channel_layout); int planar = av_sample_fmt_is_planar(frame->format); int planes = planar ? ch : 1; if (pool->format == frame->format && pool->planes == planes && pool->channels == ch && frame->nb_samples == pool->samples) return 0; av_buffer_pool_uninit(&pool->pools[0]); ret = av_samples_get_buffer_size(&pool->linesize[0], ch, frame->nb_samples, frame->format, 0); if (ret < 0) goto fail; pool->pools[0] = av_buffer_pool_init(pool->linesize[0], NULL); if (!pool->pools[0]) { ret = AVERROR(ENOMEM); goto fail; } pool->format = frame->format; pool->planes = planes; pool->channels = ch; pool->samples = frame->nb_samples; break; } default: av_assert0(0); } return 0; fail: for (i = 0; i < 4; i++) av_buffer_pool_uninit(&pool->pools[i]); pool->format = -1; pool->planes = pool->channels = pool->samples = 0; pool->width = pool->height = 0; return ret; } static int audio_get_buffer(AVCodecContext *avctx, AVFrame *frame) { FramePool *pool = avctx->internal->pool; int planes = pool->planes; int i; frame->linesize[0] = pool->linesize[0]; if (planes > AV_NUM_DATA_POINTERS) { frame->extended_data = av_mallocz(planes * sizeof(*frame->extended_data)); frame->nb_extended_buf = planes - AV_NUM_DATA_POINTERS; frame->extended_buf = av_mallocz(frame->nb_extended_buf * sizeof(*frame->extended_buf)); if (!frame->extended_data || !frame->extended_buf) { av_freep(&frame->extended_data); av_freep(&frame->extended_buf); return AVERROR(ENOMEM); } } else frame->extended_data = frame->data; for (i = 0; i < FFMIN(planes, AV_NUM_DATA_POINTERS); i++) { frame->buf[i] = av_buffer_pool_get(pool->pools[0]); if (!frame->buf[i]) goto fail; frame->extended_data[i] = frame->data[i] = frame->buf[i]->data; } for (i = 0; i < frame->nb_extended_buf; i++) { frame->extended_buf[i] = av_buffer_pool_get(pool->pools[0]); if (!frame->extended_buf[i]) goto fail; frame->extended_data[i + AV_NUM_DATA_POINTERS] = frame->extended_buf[i]->data; } if (avctx->debug & FF_DEBUG_BUFFERS) av_log(avctx, AV_LOG_DEBUG, "default_get_buffer called on frame %p", frame); return 0; fail: av_frame_unref(frame); return AVERROR(ENOMEM); } static int video_get_buffer(AVCodecContext *s, AVFrame *pic) { FramePool *pool = s->internal->pool; const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pic->format); int pixel_size = desc->comp[0].step_minus1 + 1; int h_chroma_shift, v_chroma_shift; int i; if (pic->data[0] != NULL) { av_log(s, AV_LOG_ERROR, "pic->data[0]!=NULL in avcodec_default_get_buffer\n"); return -1; } memset(pic->data, 0, sizeof(pic->data)); pic->extended_data = pic->data; av_pix_fmt_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift); for (i = 0; i < 4 && pool->pools[i]; i++) { const int h_shift = i == 0 ? 0 : h_chroma_shift; const int v_shift = i == 0 ? 0 : v_chroma_shift; pic->linesize[i] = pool->linesize[i]; pic->buf[i] = av_buffer_pool_get(pool->pools[i]); if (!pic->buf[i]) goto fail; // no edge if EDGE EMU or not planar YUV if ((s->flags & CODEC_FLAG_EMU_EDGE) || !pool->pools[2]) pic->data[i] = pic->buf[i]->data; else { pic->data[i] = pic->buf[i]->data + FFALIGN((pic->linesize[i] * EDGE_WIDTH >> v_shift) + (pixel_size * EDGE_WIDTH >> h_shift), pool->stride_align[i]); } } for (; i < AV_NUM_DATA_POINTERS; i++) { pic->data[i] = NULL; pic->linesize[i] = 0; } if (pic->data[1] && !pic->data[2]) avpriv_set_systematic_pal2((uint32_t *)pic->data[1], s->pix_fmt); if (s->debug & FF_DEBUG_BUFFERS) av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p\n", pic); return 0; fail: av_frame_unref(pic); return AVERROR(ENOMEM); } int avcodec_default_get_buffer2(AVCodecContext *avctx, AVFrame *frame, int flags) { int ret; if ((ret = update_frame_pool(avctx, frame)) < 0) return ret; #if FF_API_GET_BUFFER FF_DISABLE_DEPRECATION_WARNINGS frame->type = FF_BUFFER_TYPE_INTERNAL; FF_ENABLE_DEPRECATION_WARNINGS #endif switch (avctx->codec_type) { case AVMEDIA_TYPE_VIDEO: return video_get_buffer(avctx, frame); case AVMEDIA_TYPE_AUDIO: return audio_get_buffer(avctx, frame); default: return -1; } } #if FF_API_GET_BUFFER FF_DISABLE_DEPRECATION_WARNINGS int avcodec_default_get_buffer(AVCodecContext *avctx, AVFrame *frame) { return avcodec_default_get_buffer2(avctx, frame, 0); } typedef struct CompatReleaseBufPriv { AVCodecContext avctx; AVFrame frame; } CompatReleaseBufPriv; static void compat_free_buffer(void *opaque, uint8_t *data) { CompatReleaseBufPriv *priv = opaque; if (priv->avctx.release_buffer) priv->avctx.release_buffer(&priv->avctx, &priv->frame); av_freep(&priv); } static void compat_release_buffer(void *opaque, uint8_t *data) { AVBufferRef *buf = opaque; av_buffer_unref(&buf); } FF_ENABLE_DEPRECATION_WARNINGS #endif int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags) { int ret; switch (avctx->codec_type) { case AVMEDIA_TYPE_VIDEO: frame->width = FFMAX(avctx->width, avctx->coded_width); frame->height = FFMAX(avctx->height, avctx->coded_height); if (frame->format < 0) frame->format = avctx->pix_fmt; if (!frame->sample_aspect_ratio.num) frame->sample_aspect_ratio = avctx->sample_aspect_ratio; if ((ret = av_image_check_size(avctx->width, avctx->height, 0, avctx)) < 0) return ret; break; case AVMEDIA_TYPE_AUDIO: if (!frame->sample_rate) frame->sample_rate = avctx->sample_rate; if (frame->format < 0) frame->format = avctx->sample_fmt; if (!frame->channel_layout) { if (avctx->channel_layout) { if (av_get_channel_layout_nb_channels(avctx->channel_layout) != avctx->channels) { av_log(avctx, AV_LOG_ERROR, "Inconsistent channel " "configuration.\n"); return AVERROR(EINVAL); } frame->channel_layout = avctx->channel_layout; } else { if (avctx->channels > FF_SANE_NB_CHANNELS) { av_log(avctx, AV_LOG_ERROR, "Too many channels: %d.\n", avctx->channels); return AVERROR(ENOSYS); } frame->channel_layout = av_get_default_channel_layout(avctx->channels); if (!frame->channel_layout) frame->channel_layout = (1ULL << avctx->channels) - 1; } } break; default: return AVERROR(EINVAL); } frame->pkt_pts = avctx->internal->pkt ? avctx->internal->pkt->pts : AV_NOPTS_VALUE; frame->reordered_opaque = avctx->reordered_opaque; #if FF_API_GET_BUFFER FF_DISABLE_DEPRECATION_WARNINGS /* * Wrap an old get_buffer()-allocated buffer in an bunch of AVBuffers. * We wrap each plane in its own AVBuffer. Each of those has a reference to * a dummy AVBuffer as its private data, unreffing it on free. * When all the planes are freed, the dummy buffer's free callback calls * release_buffer(). */ if (avctx->get_buffer) { CompatReleaseBufPriv *priv = NULL; AVBufferRef *dummy_buf = NULL; int planes, i, ret; if (flags & AV_GET_BUFFER_FLAG_REF) frame->reference = 1; ret = avctx->get_buffer(avctx, frame); if (ret < 0) return ret; /* return if the buffers are already set up * this would happen e.g. when a custom get_buffer() calls * avcodec_default_get_buffer */ if (frame->buf[0]) return 0; priv = av_mallocz(sizeof(*priv)); if (!priv) { ret = AVERROR(ENOMEM); goto fail; } priv->avctx = *avctx; priv->frame = *frame; dummy_buf = av_buffer_create(NULL, 0, compat_free_buffer, priv, 0); if (!dummy_buf) { ret = AVERROR(ENOMEM); goto fail; } #define WRAP_PLANE(ref_out, data, data_size) \ do { \ AVBufferRef *dummy_ref = av_buffer_ref(dummy_buf); \ if (!dummy_ref) { \ ret = AVERROR(ENOMEM); \ goto fail; \ } \ ref_out = av_buffer_create(data, data_size, compat_release_buffer, \ dummy_ref, 0); \ if (!ref_out) { \ av_frame_unref(frame); \ ret = AVERROR(ENOMEM); \ goto fail; \ } \ } while (0) if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) { const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(frame->format); planes = av_pix_fmt_count_planes(frame->format); /* workaround for AVHWAccel plane count of 0, buf[0] is used as check for allocated buffers: make libavcodec happy */ if (desc && desc->flags & AV_PIX_FMT_FLAG_HWACCEL) planes = 1; if (!desc || planes <= 0) { ret = AVERROR(EINVAL); goto fail; } for (i = 0; i < planes; i++) { int v_shift = (i == 1 || i == 2) ? desc->log2_chroma_h : 0; int plane_size = (frame->height >> v_shift) * frame->linesize[i]; WRAP_PLANE(frame->buf[i], frame->data[i], plane_size); } } else { int planar = av_sample_fmt_is_planar(frame->format); planes = planar ? avctx->channels : 1; if (planes > FF_ARRAY_ELEMS(frame->buf)) { frame->nb_extended_buf = planes - FF_ARRAY_ELEMS(frame->buf); frame->extended_buf = av_malloc(sizeof(*frame->extended_buf) * frame->nb_extended_buf); if (!frame->extended_buf) { ret = AVERROR(ENOMEM); goto fail; } } for (i = 0; i < FFMIN(planes, FF_ARRAY_ELEMS(frame->buf)); i++) WRAP_PLANE(frame->buf[i], frame->extended_data[i], frame->linesize[0]); for (i = 0; i < frame->nb_extended_buf; i++) WRAP_PLANE(frame->extended_buf[i], frame->extended_data[i + FF_ARRAY_ELEMS(frame->buf)], frame->linesize[0]); } av_buffer_unref(&dummy_buf); frame->width = avctx->width; frame->height = avctx->height; return 0; fail: avctx->release_buffer(avctx, frame); av_freep(&priv); av_buffer_unref(&dummy_buf); return ret; } FF_ENABLE_DEPRECATION_WARNINGS #endif ret = avctx->get_buffer2(avctx, frame, flags); if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) { frame->width = avctx->width; frame->height = avctx->height; } return ret; } int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame) { AVFrame tmp; int ret; av_assert0(avctx->codec_type == AVMEDIA_TYPE_VIDEO); if (!frame->data[0]) return ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF); if (av_frame_is_writable(frame)) return 0; av_frame_move_ref(&tmp, frame); ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF); if (ret < 0) { av_frame_unref(&tmp); return ret; } av_image_copy(frame->data, frame->linesize, tmp.data, tmp.linesize, frame->format, frame->width, frame->height); av_frame_unref(&tmp); return 0; } #if FF_API_GET_BUFFER void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic) { av_frame_unref(pic); } int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic) { av_assert0(0); return AVERROR_BUG; } #endif int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2), void *arg, int *ret, int count, int size) { int i; for (i = 0; i < count; i++) { int r = func(c, (char *)arg + i * size); if (ret) ret[i] = r; } return 0; } int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int jobnr, int threadnr), void *arg, int *ret, int count) { int i; for (i = 0; i < count; i++) { int r = func(c, arg, i, 0); if (ret) ret[i] = r; } return 0; } static int is_hwaccel_pix_fmt(enum AVPixelFormat pix_fmt) { const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt); return desc->flags & AV_PIX_FMT_FLAG_HWACCEL; } enum AVPixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum AVPixelFormat *fmt) { while (*fmt != AV_PIX_FMT_NONE && is_hwaccel_pix_fmt(*fmt)) ++fmt; return fmt[0]; } void avcodec_get_frame_defaults(AVFrame *frame) { if (frame->extended_data != frame->data) av_freep(&frame->extended_data); memset(frame, 0, sizeof(AVFrame)); frame->pts = AV_NOPTS_VALUE; frame->key_frame = 1; frame->sample_aspect_ratio = (AVRational) {0, 1 }; frame->format = -1; /* unknown */ frame->extended_data = frame->data; } AVFrame *avcodec_alloc_frame(void) { AVFrame *frame = av_mallocz(sizeof(AVFrame)); if (frame == NULL) return NULL; avcodec_get_frame_defaults(frame); return frame; } void avcodec_free_frame(AVFrame **frame) { AVFrame *f; if (!frame || !*frame) return; f = *frame; if (f->extended_data != f->data) av_freep(&f->extended_data); av_freep(frame); } int attribute_align_arg avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options) { int ret = 0; AVDictionary *tmp = NULL; if (avcodec_is_open(avctx)) return 0; if ((!codec && !avctx->codec)) { av_log(avctx, AV_LOG_ERROR, "No codec provided to avcodec_open2().\n"); return AVERROR(EINVAL); } if ((codec && avctx->codec && codec != avctx->codec)) { av_log(avctx, AV_LOG_ERROR, "This AVCodecContext was allocated for %s, " "but %s passed to avcodec_open2().\n", avctx->codec->name, codec->name); return AVERROR(EINVAL); } if (!codec) codec = avctx->codec; if (avctx->extradata_size < 0 || avctx->extradata_size >= FF_MAX_EXTRADATA_SIZE) return AVERROR(EINVAL); if (options) av_dict_copy(&tmp, *options, 0); /* If there is a user-supplied mutex locking routine, call it. */ if (lockmgr_cb) { if ((*lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN)) return -1; } entangled_thread_counter++; if (entangled_thread_counter != 1) { av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n"); ret = -1; goto end; } avctx->internal = av_mallocz(sizeof(AVCodecInternal)); if (!avctx->internal) { ret = AVERROR(ENOMEM); goto end; } avctx->internal->pool = av_mallocz(sizeof(*avctx->internal->pool)); if (!avctx->internal->pool) { ret = AVERROR(ENOMEM); goto free_and_end; } if (codec->priv_data_size > 0) { if (!avctx->priv_data) { avctx->priv_data = av_mallocz(codec->priv_data_size); if (!avctx->priv_data) { ret = AVERROR(ENOMEM); goto end; } if (codec->priv_class) { *(const AVClass **)avctx->priv_data = codec->priv_class; av_opt_set_defaults(avctx->priv_data); } } if (codec->priv_class && (ret = av_opt_set_dict(avctx->priv_data, &tmp)) < 0) goto free_and_end; } else { avctx->priv_data = NULL; } if ((ret = av_opt_set_dict(avctx, &tmp)) < 0) goto free_and_end; if (avctx->coded_width && avctx->coded_height && !avctx->width && !avctx->height) ret = ff_set_dimensions(avctx, avctx->coded_width, avctx->coded_height); else if (avctx->width && avctx->height) ret = ff_set_dimensions(avctx, avctx->width, avctx->height); if (ret < 0) goto free_and_end; if ((avctx->coded_width || avctx->coded_height || avctx->width || avctx->height) && ( av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx) < 0 || av_image_check_size(avctx->width, avctx->height, 0, avctx) < 0)) { av_log(avctx, AV_LOG_WARNING, "ignoring invalid width/height values\n"); ff_set_dimensions(avctx, 0, 0); } /* if the decoder init function was already called previously, * free the already allocated subtitle_header before overwriting it */ if (av_codec_is_decoder(codec)) av_freep(&avctx->subtitle_header); if (avctx->channels > FF_SANE_NB_CHANNELS) { ret = AVERROR(EINVAL); goto free_and_end; } avctx->codec = codec; if ((avctx->codec_type == AVMEDIA_TYPE_UNKNOWN || avctx->codec_type == codec->type) && avctx->codec_id == AV_CODEC_ID_NONE) { avctx->codec_type = codec->type; avctx->codec_id = codec->id; } if (avctx->codec_id != codec->id || (avctx->codec_type != codec->type && avctx->codec_type != AVMEDIA_TYPE_ATTACHMENT)) { av_log(avctx, AV_LOG_ERROR, "codec type or id mismatches\n"); ret = AVERROR(EINVAL); goto free_and_end; } avctx->frame_number = 0; if (avctx->codec->capabilities & CODEC_CAP_EXPERIMENTAL && avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) { ret = AVERROR_EXPERIMENTAL; goto free_and_end; } if (avctx->codec_type == AVMEDIA_TYPE_AUDIO && (!avctx->time_base.num || !avctx->time_base.den)) { avctx->time_base.num = 1; avctx->time_base.den = avctx->sample_rate; } if (HAVE_THREADS) { ret = ff_thread_init(avctx); if (ret < 0) { goto free_and_end; } } if (!HAVE_THREADS && !(codec->capabilities & CODEC_CAP_AUTO_THREADS)) avctx->thread_count = 1; if (av_codec_is_encoder(avctx->codec)) { int i; if (avctx->codec->sample_fmts) { for (i = 0; avctx->codec->sample_fmts[i] != AV_SAMPLE_FMT_NONE; i++) { if (avctx->sample_fmt == avctx->codec->sample_fmts[i]) break; if (avctx->channels == 1 && av_get_planar_sample_fmt(avctx->sample_fmt) == av_get_planar_sample_fmt(avctx->codec->sample_fmts[i])) { avctx->sample_fmt = avctx->codec->sample_fmts[i]; break; } } if (avctx->codec->sample_fmts[i] == AV_SAMPLE_FMT_NONE) { av_log(avctx, AV_LOG_ERROR, "Specified sample_fmt is not supported.\n"); ret = AVERROR(EINVAL); goto free_and_end; } } if (avctx->codec->pix_fmts) { for (i = 0; avctx->codec->pix_fmts[i] != AV_PIX_FMT_NONE; i++) if (avctx->pix_fmt == avctx->codec->pix_fmts[i]) break; if (avctx->codec->pix_fmts[i] == AV_PIX_FMT_NONE) { av_log(avctx, AV_LOG_ERROR, "Specified pix_fmt is not supported\n"); ret = AVERROR(EINVAL); goto free_and_end; } } if (avctx->codec->supported_samplerates) { for (i = 0; avctx->codec->supported_samplerates[i] != 0; i++) if (avctx->sample_rate == avctx->codec->supported_samplerates[i]) break; if (avctx->codec->supported_samplerates[i] == 0) { av_log(avctx, AV_LOG_ERROR, "Specified sample_rate is not supported\n"); ret = AVERROR(EINVAL); goto free_and_end; } } if (avctx->codec->channel_layouts) { if (!avctx->channel_layout) { av_log(avctx, AV_LOG_WARNING, "channel_layout not specified\n"); } else { for (i = 0; avctx->codec->channel_layouts[i] != 0; i++) if (avctx->channel_layout == avctx->codec->channel_layouts[i]) break; if (avctx->codec->channel_layouts[i] == 0) { av_log(avctx, AV_LOG_ERROR, "Specified channel_layout is not supported\n"); ret = AVERROR(EINVAL); goto free_and_end; } } } if (avctx->channel_layout && avctx->channels) { if (av_get_channel_layout_nb_channels(avctx->channel_layout) != avctx->channels) { av_log(avctx, AV_LOG_ERROR, "channel layout does not match number of channels\n"); ret = AVERROR(EINVAL); goto free_and_end; } } else if (avctx->channel_layout) { avctx->channels = av_get_channel_layout_nb_channels(avctx->channel_layout); } if (!avctx->rc_initial_buffer_occupancy) avctx->rc_initial_buffer_occupancy = avctx->rc_buffer_size * 3 / 4; } if (avctx->codec->init && !(avctx->active_thread_type & FF_THREAD_FRAME)) { ret = avctx->codec->init(avctx); if (ret < 0) { goto free_and_end; } } if (av_codec_is_decoder(avctx->codec)) { /* validate channel layout from the decoder */ if (avctx->channel_layout) { int channels = av_get_channel_layout_nb_channels(avctx->channel_layout); if (!avctx->channels) avctx->channels = channels; else if (channels != avctx->channels) { av_log(avctx, AV_LOG_WARNING, "channel layout does not match number of channels\n"); avctx->channel_layout = 0; } } if (avctx->channels && avctx->channels < 0 || avctx->channels > FF_SANE_NB_CHANNELS) { ret = AVERROR(EINVAL); goto free_and_end; } } end: entangled_thread_counter--; /* Release any user-supplied mutex. */ if (lockmgr_cb) { (*lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE); } if (options) { av_dict_free(options); *options = tmp; } return ret; free_and_end: av_dict_free(&tmp); av_freep(&avctx->priv_data); if (avctx->internal) av_freep(&avctx->internal->pool); av_freep(&avctx->internal); avctx->codec = NULL; goto end; } int ff_alloc_packet(AVPacket *avpkt, int size) { if (size > INT_MAX - FF_INPUT_BUFFER_PADDING_SIZE) return AVERROR(EINVAL); if (avpkt->data) { AVBufferRef *buf = avpkt->buf; #if FF_API_DESTRUCT_PACKET FF_DISABLE_DEPRECATION_WARNINGS void *destruct = avpkt->destruct; FF_ENABLE_DEPRECATION_WARNINGS #endif if (avpkt->size < size) return AVERROR(EINVAL); av_init_packet(avpkt); #if FF_API_DESTRUCT_PACKET FF_DISABLE_DEPRECATION_WARNINGS avpkt->destruct = destruct; FF_ENABLE_DEPRECATION_WARNINGS #endif avpkt->buf = buf; avpkt->size = size; return 0; } else { return av_new_packet(avpkt, size); } } /** * Pad last frame with silence. */ static int pad_last_frame(AVCodecContext *s, AVFrame **dst, const AVFrame *src) { AVFrame *frame = NULL; int ret; if (!(frame = avcodec_alloc_frame())) return AVERROR(ENOMEM); frame->format = src->format; frame->channel_layout = src->channel_layout; frame->nb_samples = s->frame_size; ret = av_frame_get_buffer(frame, 32); if (ret < 0) goto fail; ret = av_frame_copy_props(frame, src); if (ret < 0) goto fail; if ((ret = av_samples_copy(frame->extended_data, src->extended_data, 0, 0, src->nb_samples, s->channels, s->sample_fmt)) < 0) goto fail; if ((ret = av_samples_set_silence(frame->extended_data, src->nb_samples, frame->nb_samples - src->nb_samples, s->channels, s->sample_fmt)) < 0) goto fail; *dst = frame; return 0; fail: av_frame_free(&frame); return ret; } int attribute_align_arg avcodec_encode_audio2(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr) { AVFrame tmp; AVFrame *padded_frame = NULL; int ret; int user_packet = !!avpkt->data; *got_packet_ptr = 0; if (!(avctx->codec->capabilities & CODEC_CAP_DELAY) && !frame) { av_free_packet(avpkt); av_init_packet(avpkt); return 0; } /* ensure that extended_data is properly set */ if (frame && !frame->extended_data) { if (av_sample_fmt_is_planar(avctx->sample_fmt) && avctx->channels > AV_NUM_DATA_POINTERS) { av_log(avctx, AV_LOG_ERROR, "Encoding to a planar sample format, " "with more than %d channels, but extended_data is not set.\n", AV_NUM_DATA_POINTERS); return AVERROR(EINVAL); } av_log(avctx, AV_LOG_WARNING, "extended_data is not set.\n"); tmp = *frame; tmp.extended_data = tmp.data; frame = &tmp; } /* check for valid frame size */ if (frame) { if (avctx->codec->capabilities & CODEC_CAP_SMALL_LAST_FRAME) { if (frame->nb_samples > avctx->frame_size) return AVERROR(EINVAL); } else if (!(avctx->codec->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE)) { if (frame->nb_samples < avctx->frame_size && !avctx->internal->last_audio_frame) { ret = pad_last_frame(avctx, &padded_frame, frame); if (ret < 0) return ret; frame = padded_frame; avctx->internal->last_audio_frame = 1; } if (frame->nb_samples != avctx->frame_size) { ret = AVERROR(EINVAL); goto end; } } } ret = avctx->codec->encode2(avctx, avpkt, frame, got_packet_ptr); if (!ret) { if (*got_packet_ptr) { if (!(avctx->codec->capabilities & CODEC_CAP_DELAY)) { if (avpkt->pts == AV_NOPTS_VALUE) avpkt->pts = frame->pts; if (!avpkt->duration) avpkt->duration = ff_samples_to_time_base(avctx, frame->nb_samples); } avpkt->dts = avpkt->pts; } else { avpkt->size = 0; } if (!user_packet && avpkt->size) { ret = av_buffer_realloc(&avpkt->buf, avpkt->size); if (ret >= 0) avpkt->data = avpkt->buf->data; } avctx->frame_number++; } if (ret < 0 || !*got_packet_ptr) { av_free_packet(avpkt); av_init_packet(avpkt); goto end; } /* NOTE: if we add any audio encoders which output non-keyframe packets, * this needs to be moved to the encoders, but for now we can do it * here to simplify things */ avpkt->flags |= AV_PKT_FLAG_KEY; end: av_frame_free(&padded_frame); return ret; } int attribute_align_arg avcodec_encode_video2(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr) { int ret; int user_packet = !!avpkt->data; *got_packet_ptr = 0; if (!(avctx->codec->capabilities & CODEC_CAP_DELAY) && !frame) { av_free_packet(avpkt); av_init_packet(avpkt); avpkt->size = 0; return 0; } if (av_image_check_size(avctx->width, avctx->height, 0, avctx)) return AVERROR(EINVAL); av_assert0(avctx->codec->encode2); ret = avctx->codec->encode2(avctx, avpkt, frame, got_packet_ptr); if (!ret) { if (!*got_packet_ptr) avpkt->size = 0; else if (!(avctx->codec->capabilities & CODEC_CAP_DELAY)) avpkt->pts = avpkt->dts = frame->pts; if (!user_packet && avpkt->size) { ret = av_buffer_realloc(&avpkt->buf, avpkt->size); if (ret >= 0) avpkt->data = avpkt->buf->data; } avctx->frame_number++; } if (ret < 0 || !*got_packet_ptr) av_free_packet(avpkt); emms_c(); return ret; } int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size, const AVSubtitle *sub) { int ret; if (sub->start_display_time) { av_log(avctx, AV_LOG_ERROR, "start_display_time must be 0.\n"); return -1; } if (sub->num_rects == 0 || !sub->rects) return -1; ret = avctx->codec->encode_sub(avctx, buf, buf_size, sub); avctx->frame_number++; return ret; } static int apply_param_change(AVCodecContext *avctx, AVPacket *avpkt) { int size = 0, ret; const uint8_t *data; uint32_t flags; data = av_packet_get_side_data(avpkt, AV_PKT_DATA_PARAM_CHANGE, &size); if (!data) return 0; if (!(avctx->codec->capabilities & CODEC_CAP_PARAM_CHANGE)) { av_log(avctx, AV_LOG_ERROR, "This decoder does not support parameter " "changes, but PARAM_CHANGE side data was sent to it.\n"); return AVERROR(EINVAL); } if (size < 4) goto fail; flags = bytestream_get_le32(&data); size -= 4; if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT) { if (size < 4) goto fail; avctx->channels = bytestream_get_le32(&data); size -= 4; } if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT) { if (size < 8) goto fail; avctx->channel_layout = bytestream_get_le64(&data); size -= 8; } if (flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE) { if (size < 4) goto fail; avctx->sample_rate = bytestream_get_le32(&data); size -= 4; } if (flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS) { if (size < 8) goto fail; avctx->width = bytestream_get_le32(&data); avctx->height = bytestream_get_le32(&data); size -= 8; ret = ff_set_dimensions(avctx, avctx->width, avctx->height); if (ret < 0) return ret; } return 0; fail: av_log(avctx, AV_LOG_ERROR, "PARAM_CHANGE side data too small.\n"); return AVERROR_INVALIDDATA; } int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture, int *got_picture_ptr, AVPacket *avpkt) { AVCodecInternal *avci = avctx->internal; int ret; *got_picture_ptr = 0; if ((avctx->coded_width || avctx->coded_height) && av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx)) return -1; avctx->internal->pkt = avpkt; ret = apply_param_change(avctx, avpkt); if (ret < 0) { av_log(avctx, AV_LOG_ERROR, "Error applying parameter changes.\n"); if (avctx->err_recognition & AV_EF_EXPLODE) return ret; } avcodec_get_frame_defaults(picture); if (!avctx->refcounted_frames) av_frame_unref(&avci->to_free); if ((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size || (avctx->active_thread_type & FF_THREAD_FRAME)) { if (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME) ret = ff_thread_decode_frame(avctx, picture, got_picture_ptr, avpkt); else { ret = avctx->codec->decode(avctx, picture, got_picture_ptr, avpkt); picture->pkt_dts = avpkt->dts; /* get_buffer is supposed to set frame parameters */ if (!(avctx->codec->capabilities & CODEC_CAP_DR1)) { picture->sample_aspect_ratio = avctx->sample_aspect_ratio; picture->width = avctx->width; picture->height = avctx->height; picture->format = avctx->pix_fmt; } } emms_c(); //needed to avoid an emms_c() call before every return; if (ret < 0 && picture->data[0]) av_frame_unref(picture); if (*got_picture_ptr) { if (!avctx->refcounted_frames) { avci->to_free = *picture; avci->to_free.extended_data = avci->to_free.data; memset(picture->buf, 0, sizeof(picture->buf)); } avctx->frame_number++; } } else ret = 0; /* many decoders assign whole AVFrames, thus overwriting extended_data; * make sure it's set correctly */ picture->extended_data = picture->data; return ret; } int attribute_align_arg avcodec_decode_audio4(AVCodecContext *avctx, AVFrame *frame, int *got_frame_ptr, AVPacket *avpkt) { AVCodecInternal *avci = avctx->internal; int planar, channels; int ret = 0; *got_frame_ptr = 0; avctx->internal->pkt = avpkt; if (!avpkt->data && avpkt->size) { av_log(avctx, AV_LOG_ERROR, "invalid packet: NULL data, size != 0\n"); return AVERROR(EINVAL); } ret = apply_param_change(avctx, avpkt); if (ret < 0) { av_log(avctx, AV_LOG_ERROR, "Error applying parameter changes.\n"); if (avctx->err_recognition & AV_EF_EXPLODE) return ret; } avcodec_get_frame_defaults(frame); if (!avctx->refcounted_frames) av_frame_unref(&avci->to_free); if ((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size) { ret = avctx->codec->decode(avctx, frame, got_frame_ptr, avpkt); if (ret >= 0 && *got_frame_ptr) { avctx->frame_number++; frame->pkt_dts = avpkt->dts; if (frame->format == AV_SAMPLE_FMT_NONE) frame->format = avctx->sample_fmt; if (!avctx->refcounted_frames) { avci->to_free = *frame; avci->to_free.extended_data = avci->to_free.data; memset(frame->buf, 0, sizeof(frame->buf)); frame->extended_buf = NULL; frame->nb_extended_buf = 0; } } else if (frame->data[0]) av_frame_unref(frame); } /* many decoders assign whole AVFrames, thus overwriting extended_data; * make sure it's set correctly; assume decoders that actually use * extended_data are doing it correctly */ planar = av_sample_fmt_is_planar(frame->format); channels = av_get_channel_layout_nb_channels(frame->channel_layout); if (!(planar && channels > AV_NUM_DATA_POINTERS)) frame->extended_data = frame->data; return ret; } int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub, int *got_sub_ptr, AVPacket *avpkt) { int ret; avctx->internal->pkt = avpkt; *got_sub_ptr = 0; ret = avctx->codec->decode(avctx, sub, got_sub_ptr, avpkt); if (*got_sub_ptr) avctx->frame_number++; return ret; } void avsubtitle_free(AVSubtitle *sub) { int i; for (i = 0; i < sub->num_rects; i++) { av_freep(&sub->rects[i]->pict.data[0]); av_freep(&sub->rects[i]->pict.data[1]); av_freep(&sub->rects[i]->pict.data[2]); av_freep(&sub->rects[i]->pict.data[3]); av_freep(&sub->rects[i]->text); av_freep(&sub->rects[i]->ass); av_freep(&sub->rects[i]); } av_freep(&sub->rects); memset(sub, 0, sizeof(AVSubtitle)); } av_cold int avcodec_close(AVCodecContext *avctx) { /* If there is a user-supplied mutex locking routine, call it. */ if (lockmgr_cb) { if ((*lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN)) return -1; } entangled_thread_counter++; if (entangled_thread_counter != 1) { av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n"); entangled_thread_counter--; return -1; } if (avcodec_is_open(avctx)) { FramePool *pool = avctx->internal->pool; int i; if (HAVE_THREADS && avctx->internal->thread_ctx) ff_thread_free(avctx); if (avctx->codec && avctx->codec->close) avctx->codec->close(avctx); avctx->coded_frame = NULL; if (!avctx->refcounted_frames) av_frame_unref(&avctx->internal->to_free); for (i = 0; i < FF_ARRAY_ELEMS(pool->pools); i++) av_buffer_pool_uninit(&pool->pools[i]); av_freep(&avctx->internal->pool); av_freep(&avctx->internal); } if (avctx->priv_data && avctx->codec && avctx->codec->priv_class) av_opt_free(avctx->priv_data); av_opt_free(avctx); av_freep(&avctx->priv_data); if (av_codec_is_encoder(avctx->codec)) av_freep(&avctx->extradata); avctx->codec = NULL; avctx->active_thread_type = 0; entangled_thread_counter--; /* Release any user-supplied mutex. */ if (lockmgr_cb) { (*lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE); } return 0; } static AVCodec *find_encdec(enum AVCodecID id, int encoder) { AVCodec *p, *experimental = NULL; p = first_avcodec; while (p) { if ((encoder ? av_codec_is_encoder(p) : av_codec_is_decoder(p)) && p->id == id) { if (p->capabilities & CODEC_CAP_EXPERIMENTAL && !experimental) { experimental = p; } else return p; } p = p->next; } return experimental; } AVCodec *avcodec_find_encoder(enum AVCodecID id) { return find_encdec(id, 1); } AVCodec *avcodec_find_encoder_by_name(const char *name) { AVCodec *p; if (!name) return NULL; p = first_avcodec; while (p) { if (av_codec_is_encoder(p) && strcmp(name, p->name) == 0) return p; p = p->next; } return NULL; } AVCodec *avcodec_find_decoder(enum AVCodecID id) { return find_encdec(id, 0); } AVCodec *avcodec_find_decoder_by_name(const char *name) { AVCodec *p; if (!name) return NULL; p = first_avcodec; while (p) { if (av_codec_is_decoder(p) && strcmp(name, p->name) == 0) return p; p = p->next; } return NULL; } static int get_bit_rate(AVCodecContext *ctx) { int bit_rate; int bits_per_sample; switch (ctx->codec_type) { case AVMEDIA_TYPE_VIDEO: case AVMEDIA_TYPE_DATA: case AVMEDIA_TYPE_SUBTITLE: case AVMEDIA_TYPE_ATTACHMENT: bit_rate = ctx->bit_rate; break; case AVMEDIA_TYPE_AUDIO: bits_per_sample = av_get_bits_per_sample(ctx->codec_id); bit_rate = bits_per_sample ? ctx->sample_rate * ctx->channels * bits_per_sample : ctx->bit_rate; break; default: bit_rate = 0; break; } return bit_rate; } size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag) { int i, len, ret = 0; #define TAG_PRINT(x) \ (((x) >= '0' && (x) <= '9') || \ ((x) >= 'a' && (x) <= 'z') || ((x) >= 'A' && (x) <= 'Z') || \ ((x) == '.' || (x) == ' ')) for (i = 0; i < 4; i++) { len = snprintf(buf, buf_size, TAG_PRINT(codec_tag & 0xFF) ? "%c" : "[%d]", codec_tag & 0xFF); buf += len; buf_size = buf_size > len ? buf_size - len : 0; ret += len; codec_tag >>= 8; } return ret; } void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode) { const char *codec_name; const char *profile = NULL; const AVCodec *p; char buf1[32]; int bitrate; AVRational display_aspect_ratio; if (enc->codec) p = enc->codec; else if (encode) p = avcodec_find_encoder(enc->codec_id); else p = avcodec_find_decoder(enc->codec_id); if (p) { codec_name = p->name; profile = av_get_profile_name(p, enc->profile); } else if (enc->codec_id == AV_CODEC_ID_MPEG2TS) { /* fake mpeg2 transport stream codec (currently not * registered) */ codec_name = "mpeg2ts"; } else if (enc->codec_name[0] != '\0') { codec_name = enc->codec_name; } else { /* output avi tags */ char tag_buf[32]; av_get_codec_tag_string(tag_buf, sizeof(tag_buf), enc->codec_tag); snprintf(buf1, sizeof(buf1), "%s / 0x%04X", tag_buf, enc->codec_tag); codec_name = buf1; } switch (enc->codec_type) { case AVMEDIA_TYPE_VIDEO: snprintf(buf, buf_size, "Video: %s%s", codec_name, enc->mb_decision ? " (hq)" : ""); if (profile) snprintf(buf + strlen(buf), buf_size - strlen(buf), " (%s)", profile); if (enc->pix_fmt != AV_PIX_FMT_NONE) { snprintf(buf + strlen(buf), buf_size - strlen(buf), ", %s", av_get_pix_fmt_name(enc->pix_fmt)); } if (enc->width) { snprintf(buf + strlen(buf), buf_size - strlen(buf), ", %dx%d", enc->width, enc->height); if (enc->sample_aspect_ratio.num) { av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den, enc->width * enc->sample_aspect_ratio.num, enc->height * enc->sample_aspect_ratio.den, 1024 * 1024); snprintf(buf + strlen(buf), buf_size - strlen(buf), " [PAR %d:%d DAR %d:%d]", enc->sample_aspect_ratio.num, enc->sample_aspect_ratio.den, display_aspect_ratio.num, display_aspect_ratio.den); } if (av_log_get_level() >= AV_LOG_DEBUG) { int g = av_gcd(enc->time_base.num, enc->time_base.den); snprintf(buf + strlen(buf), buf_size - strlen(buf), ", %d/%d", enc->time_base.num / g, enc->time_base.den / g); } } if (encode) { snprintf(buf + strlen(buf), buf_size - strlen(buf), ", q=%d-%d", enc->qmin, enc->qmax); } break; case AVMEDIA_TYPE_AUDIO: snprintf(buf, buf_size, "Audio: %s", codec_name); if (profile) snprintf(buf + strlen(buf), buf_size - strlen(buf), " (%s)", profile); if (enc->sample_rate) { snprintf(buf + strlen(buf), buf_size - strlen(buf), ", %d Hz", enc->sample_rate); } av_strlcat(buf, ", ", buf_size); av_get_channel_layout_string(buf + strlen(buf), buf_size - strlen(buf), enc->channels, enc->channel_layout); if (enc->sample_fmt != AV_SAMPLE_FMT_NONE) { snprintf(buf + strlen(buf), buf_size - strlen(buf), ", %s", av_get_sample_fmt_name(enc->sample_fmt)); } break; case AVMEDIA_TYPE_DATA: snprintf(buf, buf_size, "Data: %s", codec_name); break; case AVMEDIA_TYPE_SUBTITLE: snprintf(buf, buf_size, "Subtitle: %s", codec_name); break; case AVMEDIA_TYPE_ATTACHMENT: snprintf(buf, buf_size, "Attachment: %s", codec_name); break; default: snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type); return; } if (encode) { if (enc->flags & CODEC_FLAG_PASS1) snprintf(buf + strlen(buf), buf_size - strlen(buf), ", pass 1"); if (enc->flags & CODEC_FLAG_PASS2) snprintf(buf + strlen(buf), buf_size - strlen(buf), ", pass 2"); } bitrate = get_bit_rate(enc); if (bitrate != 0) { snprintf(buf + strlen(buf), buf_size - strlen(buf), ", %d kb/s", bitrate / 1000); } } const char *av_get_profile_name(const AVCodec *codec, int profile) { const AVProfile *p; if (profile == FF_PROFILE_UNKNOWN || !codec->profiles) return NULL; for (p = codec->profiles; p->profile != FF_PROFILE_UNKNOWN; p++) if (p->profile == profile) return p->name; return NULL; } unsigned avcodec_version(void) { return LIBAVCODEC_VERSION_INT; } const char *avcodec_configuration(void) { return LIBAV_CONFIGURATION; } const char *avcodec_license(void) { #define LICENSE_PREFIX "libavcodec license: " return LICENSE_PREFIX LIBAV_LICENSE + sizeof(LICENSE_PREFIX) - 1; } void avcodec_flush_buffers(AVCodecContext *avctx) { if (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME) ff_thread_flush(avctx); else if (avctx->codec->flush) avctx->codec->flush(avctx); if (!avctx->refcounted_frames) av_frame_unref(&avctx->internal->to_free); } int av_get_exact_bits_per_sample(enum AVCodecID codec_id) { switch (codec_id) { case AV_CODEC_ID_ADPCM_CT: case AV_CODEC_ID_ADPCM_IMA_APC: case AV_CODEC_ID_ADPCM_IMA_EA_SEAD: case AV_CODEC_ID_ADPCM_IMA_WS: case AV_CODEC_ID_ADPCM_G722: case AV_CODEC_ID_ADPCM_YAMAHA: return 4; case AV_CODEC_ID_PCM_ALAW: case AV_CODEC_ID_PCM_MULAW: case AV_CODEC_ID_PCM_S8: case AV_CODEC_ID_PCM_U8: case AV_CODEC_ID_PCM_ZORK: return 8; case AV_CODEC_ID_PCM_S16BE: case AV_CODEC_ID_PCM_S16LE: case AV_CODEC_ID_PCM_S16LE_PLANAR: case AV_CODEC_ID_PCM_U16BE: case AV_CODEC_ID_PCM_U16LE: return 16; case AV_CODEC_ID_PCM_S24DAUD: case AV_CODEC_ID_PCM_S24BE: case AV_CODEC_ID_PCM_S24LE: case AV_CODEC_ID_PCM_S24LE_PLANAR: case AV_CODEC_ID_PCM_U24BE: case AV_CODEC_ID_PCM_U24LE: return 24; case AV_CODEC_ID_PCM_S32BE: case AV_CODEC_ID_PCM_S32LE: case AV_CODEC_ID_PCM_S32LE_PLANAR: case AV_CODEC_ID_PCM_U32BE: case AV_CODEC_ID_PCM_U32LE: case AV_CODEC_ID_PCM_F32BE: case AV_CODEC_ID_PCM_F32LE: return 32; case AV_CODEC_ID_PCM_F64BE: case AV_CODEC_ID_PCM_F64LE: return 64; default: return 0; } } int av_get_bits_per_sample(enum AVCodecID codec_id) { switch (codec_id) { case AV_CODEC_ID_ADPCM_SBPRO_2: return 2; case AV_CODEC_ID_ADPCM_SBPRO_3: return 3; case AV_CODEC_ID_ADPCM_SBPRO_4: case AV_CODEC_ID_ADPCM_IMA_WAV: case AV_CODEC_ID_ADPCM_IMA_QT: case AV_CODEC_ID_ADPCM_SWF: case AV_CODEC_ID_ADPCM_MS: return 4; default: return av_get_exact_bits_per_sample(codec_id); } } int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes) { int id, sr, ch, ba, tag, bps; id = avctx->codec_id; sr = avctx->sample_rate; ch = avctx->channels; ba = avctx->block_align; tag = avctx->codec_tag; bps = av_get_exact_bits_per_sample(avctx->codec_id); /* codecs with an exact constant bits per sample */ if (bps > 0 && ch > 0 && frame_bytes > 0) return (frame_bytes * 8) / (bps * ch); bps = avctx->bits_per_coded_sample; /* codecs with a fixed packet duration */ switch (id) { case AV_CODEC_ID_ADPCM_ADX: return 32; case AV_CODEC_ID_ADPCM_IMA_QT: return 64; case AV_CODEC_ID_ADPCM_EA_XAS: return 128; case AV_CODEC_ID_AMR_NB: case AV_CODEC_ID_GSM: case AV_CODEC_ID_QCELP: case AV_CODEC_ID_RA_144: case AV_CODEC_ID_RA_288: return 160; case AV_CODEC_ID_IMC: return 256; case AV_CODEC_ID_AMR_WB: case AV_CODEC_ID_GSM_MS: return 320; case AV_CODEC_ID_MP1: return 384; case AV_CODEC_ID_ATRAC1: return 512; case AV_CODEC_ID_ATRAC3: return 1024; case AV_CODEC_ID_MP2: case AV_CODEC_ID_MUSEPACK7: return 1152; case AV_CODEC_ID_AC3: return 1536; } if (sr > 0) { /* calc from sample rate */ if (id == AV_CODEC_ID_TTA) return 256 * sr / 245; if (ch > 0) { /* calc from sample rate and channels */ if (id == AV_CODEC_ID_BINKAUDIO_DCT) return (480 << (sr / 22050)) / ch; } } if (ba > 0) { /* calc from block_align */ if (id == AV_CODEC_ID_SIPR) { switch (ba) { case 20: return 160; case 19: return 144; case 29: return 288; case 37: return 480; } } else if (id == AV_CODEC_ID_ILBC) { switch (ba) { case 38: return 160; case 50: return 240; } } } if (frame_bytes > 0) { /* calc from frame_bytes only */ if (id == AV_CODEC_ID_TRUESPEECH) return 240 * (frame_bytes / 32); if (id == AV_CODEC_ID_NELLYMOSER) return 256 * (frame_bytes / 64); if (bps > 0) { /* calc from frame_bytes and bits_per_coded_sample */ if (id == AV_CODEC_ID_ADPCM_G726) return frame_bytes * 8 / bps; } if (ch > 0) { /* calc from frame_bytes and channels */ switch (id) { case AV_CODEC_ID_ADPCM_4XM: case AV_CODEC_ID_ADPCM_IMA_ISS: return (frame_bytes - 4 * ch) * 2 / ch; case AV_CODEC_ID_ADPCM_IMA_SMJPEG: return (frame_bytes - 4) * 2 / ch; case AV_CODEC_ID_ADPCM_IMA_AMV: return (frame_bytes - 8) * 2 / ch; case AV_CODEC_ID_ADPCM_XA: return (frame_bytes / 128) * 224 / ch; case AV_CODEC_ID_INTERPLAY_DPCM: return (frame_bytes - 6 - ch) / ch; case AV_CODEC_ID_ROQ_DPCM: return (frame_bytes - 8) / ch; case AV_CODEC_ID_XAN_DPCM: return (frame_bytes - 2 * ch) / ch; case AV_CODEC_ID_MACE3: return 3 * frame_bytes / ch; case AV_CODEC_ID_MACE6: return 6 * frame_bytes / ch; case AV_CODEC_ID_PCM_LXF: return 2 * (frame_bytes / (5 * ch)); } if (tag) { /* calc from frame_bytes, channels, and codec_tag */ if (id == AV_CODEC_ID_SOL_DPCM) { if (tag == 3) return frame_bytes / ch; else return frame_bytes * 2 / ch; } } if (ba > 0) { /* calc from frame_bytes, channels, and block_align */ int blocks = frame_bytes / ba; switch (avctx->codec_id) { case AV_CODEC_ID_ADPCM_IMA_WAV: return blocks * (1 + (ba - 4 * ch) / (4 * ch) * 8); case AV_CODEC_ID_ADPCM_IMA_DK3: return blocks * (((ba - 16) * 2 / 3 * 4) / ch); case AV_CODEC_ID_ADPCM_IMA_DK4: return blocks * (1 + (ba - 4 * ch) * 2 / ch); case AV_CODEC_ID_ADPCM_MS: return blocks * (2 + (ba - 7 * ch) * 2 / ch); } } if (bps > 0) { /* calc from frame_bytes, channels, and bits_per_coded_sample */ switch (avctx->codec_id) { case AV_CODEC_ID_PCM_DVD: return 2 * (frame_bytes / ((bps * 2 / 8) * ch)); case AV_CODEC_ID_PCM_BLURAY: return frame_bytes / ((FFALIGN(ch, 2) * bps) / 8); case AV_CODEC_ID_S302M: return 2 * (frame_bytes / ((bps + 4) / 4)) / ch; } } } } return 0; } #if !HAVE_THREADS int ff_thread_init(AVCodecContext *s) { return -1; } #endif unsigned int av_xiphlacing(unsigned char *s, unsigned int v) { unsigned int n = 0; while (v >= 0xff) { *s++ = 0xff; v -= 0xff; n++; } *s = v; n++; return n; } int ff_match_2uint16(const uint16_t(*tab)[2], int size, int a, int b) { int i; for (i = 0; i < size && !(tab[i][0] == a && tab[i][1] == b); i++) ; return i; } #if FF_API_MISSING_SAMPLE FF_DISABLE_DEPRECATION_WARNINGS void av_log_missing_feature(void *avc, const char *feature, int want_sample) { av_log(avc, AV_LOG_WARNING, "%s is not implemented. Update your Libav " "version to the newest one from Git. If the problem still " "occurs, it means that your file has a feature which has not " "been implemented.\n", feature); if(want_sample) av_log_ask_for_sample(avc, NULL); } void av_log_ask_for_sample(void *avc, const char *msg, ...) { va_list argument_list; va_start(argument_list, msg); if (msg) av_vlog(avc, AV_LOG_WARNING, msg, argument_list); av_log(avc, AV_LOG_WARNING, "If you want to help, upload a sample " "of this file to ftp://upload.libav.org/incoming/ " "and contact the libav-devel mailing list.\n"); va_end(argument_list); } FF_ENABLE_DEPRECATION_WARNINGS #endif /* FF_API_MISSING_SAMPLE */ static AVHWAccel *first_hwaccel = NULL; void av_register_hwaccel(AVHWAccel *hwaccel) { AVHWAccel **p = &first_hwaccel; while (*p) p = &(*p)->next; *p = hwaccel; hwaccel->next = NULL; } AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel) { return hwaccel ? hwaccel->next : first_hwaccel; } AVHWAccel *ff_find_hwaccel(enum AVCodecID codec_id, enum AVPixelFormat pix_fmt) { AVHWAccel *hwaccel = NULL; while ((hwaccel = av_hwaccel_next(hwaccel))) if (hwaccel->id == codec_id && hwaccel->pix_fmt == pix_fmt) return hwaccel; return NULL; } int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op)) { if (lockmgr_cb) { if (lockmgr_cb(&codec_mutex, AV_LOCK_DESTROY)) return -1; if (lockmgr_cb(&avformat_mutex, AV_LOCK_DESTROY)) return -1; } lockmgr_cb = cb; if (lockmgr_cb) { if (lockmgr_cb(&codec_mutex, AV_LOCK_CREATE)) return -1; if (lockmgr_cb(&avformat_mutex, AV_LOCK_CREATE)) return -1; } return 0; } int avpriv_lock_avformat(void) { if (lockmgr_cb) { if ((*lockmgr_cb)(&avformat_mutex, AV_LOCK_OBTAIN)) return -1; } return 0; } int avpriv_unlock_avformat(void) { if (lockmgr_cb) { if ((*lockmgr_cb)(&avformat_mutex, AV_LOCK_RELEASE)) return -1; } return 0; } unsigned int avpriv_toupper4(unsigned int x) { return av_toupper(x & 0xFF) + (av_toupper((x >> 8) & 0xFF) << 8) + (av_toupper((x >> 16) & 0xFF) << 16) + (av_toupper((x >> 24) & 0xFF) << 24); } int ff_thread_ref_frame(ThreadFrame *dst, ThreadFrame *src) { int ret; dst->owner = src->owner; ret = av_frame_ref(dst->f, src->f); if (ret < 0) return ret; if (src->progress && !(dst->progress = av_buffer_ref(src->progress))) { ff_thread_release_buffer(dst->owner, dst); return AVERROR(ENOMEM); } return 0; } #if !HAVE_THREADS int ff_thread_get_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags) { f->owner = avctx; return ff_get_buffer(avctx, f->f, flags); } void ff_thread_release_buffer(AVCodecContext *avctx, ThreadFrame *f) { av_frame_unref(f->f); } void ff_thread_finish_setup(AVCodecContext *avctx) { } void ff_thread_report_progress(ThreadFrame *f, int progress, int field) { } void ff_thread_await_progress(ThreadFrame *f, int progress, int field) { } #endif enum AVMediaType avcodec_get_type(enum AVCodecID codec_id) { if (codec_id <= AV_CODEC_ID_NONE) return AVMEDIA_TYPE_UNKNOWN; else if (codec_id < AV_CODEC_ID_FIRST_AUDIO) return AVMEDIA_TYPE_VIDEO; else if (codec_id < AV_CODEC_ID_FIRST_SUBTITLE) return AVMEDIA_TYPE_AUDIO; else if (codec_id < AV_CODEC_ID_FIRST_UNKNOWN) return AVMEDIA_TYPE_SUBTITLE; return AVMEDIA_TYPE_UNKNOWN; } int avcodec_is_open(AVCodecContext *s) { return !!s->internal; } const uint8_t *avpriv_find_start_code(const uint8_t *restrict p, const uint8_t *end, uint32_t * restrict state) { int i; assert(p <= end); if (p >= end) return end; for (i = 0; i < 3; i++) { uint32_t tmp = *state << 8; *state = tmp + *(p++); if (tmp == 0x100 || p == end) return p; } while (p < end) { if (p[-1] > 1 ) p += 3; else if (p[-2] ) p += 2; else if (p[-3]|(p[-1]-1)) p++; else { p++; break; } } p = FFMIN(p, end) - 4; *state = AV_RB32(p); return p + 4; }