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497 lines
18 KiB
497 lines
18 KiB
/* |
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* Raw Video Decoder |
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* Copyright (c) 2001 Fabrice Bellard |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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/** |
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* @file |
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* Raw Video Decoder |
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*/ |
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#include "avcodec.h" |
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#include "bswapdsp.h" |
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#include "get_bits.h" |
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#include "internal.h" |
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#include "raw.h" |
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#include "libavutil/avassert.h" |
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#include "libavutil/buffer.h" |
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#include "libavutil/common.h" |
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#include "libavutil/intreadwrite.h" |
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#include "libavutil/imgutils.h" |
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#include "libavutil/opt.h" |
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typedef struct RawVideoContext { |
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AVClass *av_class; |
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AVBufferRef *palette; |
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int frame_size; /* size of the frame in bytes */ |
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int flip; |
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int is_1_2_4_8_bpp; // 1, 2, 4 and 8 bpp in avi/mov, 1 and 8 bpp in nut |
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int is_mono; |
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int is_pal8; |
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int is_nut_mono; |
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int is_nut_pal8; |
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int is_yuv2; |
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int is_lt_16bpp; // 16bpp pixfmt and bits_per_coded_sample < 16 |
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int tff; |
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BswapDSPContext bbdsp; |
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void *bitstream_buf; |
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unsigned int bitstream_buf_size; |
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} RawVideoContext; |
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static const AVOption options[]={ |
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{"top", "top field first", offsetof(RawVideoContext, tff), AV_OPT_TYPE_BOOL, {.i64 = -1}, -1, 1, AV_OPT_FLAG_DECODING_PARAM|AV_OPT_FLAG_VIDEO_PARAM}, |
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{NULL} |
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}; |
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static const AVClass rawdec_class = { |
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.class_name = "rawdec", |
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.option = options, |
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.version = LIBAVUTIL_VERSION_INT, |
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}; |
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static av_cold int raw_init_decoder(AVCodecContext *avctx) |
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{ |
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RawVideoContext *context = avctx->priv_data; |
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const AVPixFmtDescriptor *desc; |
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ff_bswapdsp_init(&context->bbdsp); |
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if ( avctx->codec_tag == MKTAG('r','a','w',' ') |
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|| avctx->codec_tag == MKTAG('N','O','1','6')) |
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avctx->pix_fmt = avpriv_find_pix_fmt(avpriv_pix_fmt_bps_mov, |
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avctx->bits_per_coded_sample); |
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else if (avctx->codec_tag == MKTAG('W', 'R', 'A', 'W')) |
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avctx->pix_fmt = avpriv_find_pix_fmt(avpriv_pix_fmt_bps_avi, |
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avctx->bits_per_coded_sample); |
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else if (avctx->codec_tag && (avctx->codec_tag & 0xFFFFFF) != MKTAG('B','I','T', 0)) |
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avctx->pix_fmt = avpriv_find_pix_fmt(ff_raw_pix_fmt_tags, avctx->codec_tag); |
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else if (avctx->pix_fmt == AV_PIX_FMT_NONE && avctx->bits_per_coded_sample) |
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avctx->pix_fmt = avpriv_find_pix_fmt(avpriv_pix_fmt_bps_avi, |
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avctx->bits_per_coded_sample); |
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desc = av_pix_fmt_desc_get(avctx->pix_fmt); |
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if (!desc) { |
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av_log(avctx, AV_LOG_ERROR, "Invalid pixel format.\n"); |
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return AVERROR(EINVAL); |
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} |
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if (desc->flags & (AV_PIX_FMT_FLAG_PAL | AV_PIX_FMT_FLAG_PSEUDOPAL)) { |
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context->palette = av_buffer_alloc(AVPALETTE_SIZE); |
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if (!context->palette) |
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return AVERROR(ENOMEM); |
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if (desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL) |
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avpriv_set_systematic_pal2((uint32_t*)context->palette->data, avctx->pix_fmt); |
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else { |
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memset(context->palette->data, 0, AVPALETTE_SIZE); |
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if (avctx->bits_per_coded_sample == 1) |
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memset(context->palette->data, 0xff, 4); |
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} |
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} |
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if ((avctx->extradata_size >= 9 && |
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!memcmp(avctx->extradata + avctx->extradata_size - 9, "BottomUp", 9)) || |
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avctx->codec_tag == MKTAG('c','y','u','v') || |
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avctx->codec_tag == MKTAG(3, 0, 0, 0) || |
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avctx->codec_tag == MKTAG('W','R','A','W')) |
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context->flip = 1; |
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if (avctx->pix_fmt == AV_PIX_FMT_MONOWHITE || |
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avctx->pix_fmt == AV_PIX_FMT_MONOBLACK) |
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context->is_mono = 1; |
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else if (avctx->pix_fmt == AV_PIX_FMT_PAL8) |
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context->is_pal8 = 1; |
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if (avctx->codec_tag == MKTAG('B','1','W','0') || |
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avctx->codec_tag == MKTAG('B','0','W','1')) |
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context->is_nut_mono = 1; |
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else if (avctx->codec_tag == MKTAG('P','A','L',8)) |
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context->is_nut_pal8 = 1; |
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if (avctx->codec_tag == AV_RL32("yuv2") && |
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avctx->pix_fmt == AV_PIX_FMT_YUYV422) |
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context->is_yuv2 = 1; |
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return 0; |
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} |
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static void flip(AVCodecContext *avctx, AVFrame *frame) |
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{ |
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frame->data[0] += frame->linesize[0] * (avctx->height - 1); |
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frame->linesize[0] *= -1; |
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} |
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/* |
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* Scale sample to 16-bit resolution |
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*/ |
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#define SCALE16(x, bits) (((x) << (16 - (bits))) | ((x) >> (2 * (bits) - 16))) |
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/** |
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* Scale buffer to 16 bits per coded sample resolution |
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*/ |
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#define MKSCALE16(name, r16, w16) \ |
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static void name(AVCodecContext *avctx, uint8_t * dst, const uint8_t *buf, int buf_size, int packed) \ |
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{ \ |
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int i; \ |
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if (!packed) { \ |
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for (i = 0; i + 1 < buf_size; i += 2) \ |
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w16(dst + i, SCALE16(r16(buf + i), avctx->bits_per_coded_sample)); \ |
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} else { \ |
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GetBitContext gb; \ |
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init_get_bits(&gb, buf, buf_size * 8); \ |
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for (i = 0; i < avctx->width * avctx->height; i++) { \ |
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int sample = get_bits(&gb, avctx->bits_per_coded_sample); \ |
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w16(dst + i*2, SCALE16(sample, avctx->bits_per_coded_sample)); \ |
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} \ |
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} \ |
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} |
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MKSCALE16(scale16be, AV_RB16, AV_WB16) |
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MKSCALE16(scale16le, AV_RL16, AV_WL16) |
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static int raw_decode(AVCodecContext *avctx, void *data, int *got_frame, |
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AVPacket *avpkt) |
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{ |
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const AVPixFmtDescriptor *desc; |
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RawVideoContext *context = avctx->priv_data; |
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const uint8_t *buf = avpkt->data; |
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int buf_size = avpkt->size; |
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int linesize_align = 4; |
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int stride; |
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int res, len; |
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int need_copy; |
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AVFrame *frame = data; |
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if (avctx->width <= 0) { |
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av_log(avctx, AV_LOG_ERROR, "width is not set\n"); |
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return AVERROR_INVALIDDATA; |
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} |
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if (avctx->height <= 0) { |
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av_log(avctx, AV_LOG_ERROR, "height is not set\n"); |
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return AVERROR_INVALIDDATA; |
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} |
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if (context->is_nut_mono) |
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stride = avctx->width / 8 + (avctx->width & 7 ? 1 : 0); |
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else if (context->is_nut_pal8) |
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stride = avctx->width; |
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else |
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stride = avpkt->size / avctx->height; |
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av_log(avctx, AV_LOG_DEBUG, "PACKET SIZE: %d, STRIDE: %d\n", avpkt->size, stride); |
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if (stride == 0 || avpkt->size < stride * avctx->height) { |
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av_log(avctx, AV_LOG_ERROR, "Packet too small (%d)\n", avpkt->size); |
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return AVERROR_INVALIDDATA; |
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} |
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desc = av_pix_fmt_desc_get(avctx->pix_fmt); |
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if ((avctx->bits_per_coded_sample == 8 || avctx->bits_per_coded_sample == 4 || |
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avctx->bits_per_coded_sample == 2 || avctx->bits_per_coded_sample == 1 || |
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(avctx->bits_per_coded_sample == 0 && (context->is_nut_pal8 || context->is_mono)) ) && |
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(context->is_mono || context->is_pal8) && |
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(!avctx->codec_tag || avctx->codec_tag == MKTAG('r','a','w',' ') || |
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context->is_nut_mono || context->is_nut_pal8)) { |
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context->is_1_2_4_8_bpp = 1; |
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if (context->is_mono) { |
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int row_bytes = avctx->width / 8 + (avctx->width & 7 ? 1 : 0); |
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context->frame_size = av_image_get_buffer_size(avctx->pix_fmt, |
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FFALIGN(row_bytes, 16) * 8, |
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avctx->height, 1); |
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} else |
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context->frame_size = av_image_get_buffer_size(avctx->pix_fmt, |
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FFALIGN(avctx->width, 16), |
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avctx->height, 1); |
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} else { |
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context->is_lt_16bpp = av_get_bits_per_pixel(desc) == 16 && avctx->bits_per_coded_sample && avctx->bits_per_coded_sample < 16; |
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context->frame_size = av_image_get_buffer_size(avctx->pix_fmt, avctx->width, |
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avctx->height, 1); |
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} |
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if (context->frame_size < 0) |
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return context->frame_size; |
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need_copy = !avpkt->buf || context->is_1_2_4_8_bpp || context->is_yuv2 || context->is_lt_16bpp; |
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frame->pict_type = AV_PICTURE_TYPE_I; |
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frame->key_frame = 1; |
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res = ff_decode_frame_props(avctx, frame); |
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if (res < 0) |
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return res; |
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av_frame_set_pkt_pos (frame, avctx->internal->pkt->pos); |
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av_frame_set_pkt_duration(frame, avctx->internal->pkt->duration); |
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if (context->tff >= 0) { |
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frame->interlaced_frame = 1; |
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frame->top_field_first = context->tff; |
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} |
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if ((res = av_image_check_size(avctx->width, avctx->height, 0, avctx)) < 0) |
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return res; |
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if (need_copy) |
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frame->buf[0] = av_buffer_alloc(FFMAX(context->frame_size, buf_size)); |
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else |
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frame->buf[0] = av_buffer_ref(avpkt->buf); |
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if (!frame->buf[0]) |
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return AVERROR(ENOMEM); |
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// 1, 2, 4 and 8 bpp in avi/mov, 1 and 8 bpp in nut |
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if (context->is_1_2_4_8_bpp) { |
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int i, j, row_pix = 0; |
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uint8_t *dst = frame->buf[0]->data; |
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buf_size = context->frame_size - (context->is_pal8 ? AVPALETTE_SIZE : 0); |
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if (avctx->bits_per_coded_sample == 8 || context->is_nut_pal8 || context->is_mono) { |
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int pix_per_byte = context->is_mono ? 8 : 1; |
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for (i = 0, j = 0; j < buf_size && i<avpkt->size; i++, j++) { |
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dst[j] = buf[i]; |
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row_pix += pix_per_byte; |
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if (row_pix >= avctx->width) { |
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i += stride - (i % stride) - 1; |
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j += 16 - (j % 16) - 1; |
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row_pix = 0; |
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} |
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} |
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} else if (avctx->bits_per_coded_sample == 4) { |
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for (i = 0, j = 0; 2 * j + 1 < buf_size && i<avpkt->size; i++, j++) { |
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dst[2 * j + 0] = buf[i] >> 4; |
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dst[2 * j + 1] = buf[i] & 15; |
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row_pix += 2; |
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if (row_pix >= avctx->width) { |
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i += stride - (i % stride) - 1; |
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j += 8 - (j % 8) - 1; |
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row_pix = 0; |
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} |
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} |
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} else if (avctx->bits_per_coded_sample == 2) { |
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for (i = 0, j = 0; 4 * j + 3 < buf_size && i<avpkt->size; i++, j++) { |
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dst[4 * j + 0] = buf[i] >> 6; |
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dst[4 * j + 1] = buf[i] >> 4 & 3; |
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dst[4 * j + 2] = buf[i] >> 2 & 3; |
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dst[4 * j + 3] = buf[i] & 3; |
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row_pix += 4; |
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if (row_pix >= avctx->width) { |
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i += stride - (i % stride) - 1; |
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j += 4 - (j % 4) - 1; |
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row_pix = 0; |
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} |
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} |
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} else { |
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av_assert0(avctx->bits_per_coded_sample == 1); |
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for (i = 0, j = 0; 8 * j + 7 < buf_size && i<avpkt->size; i++, j++) { |
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dst[8 * j + 0] = buf[i] >> 7; |
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dst[8 * j + 1] = buf[i] >> 6 & 1; |
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dst[8 * j + 2] = buf[i] >> 5 & 1; |
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dst[8 * j + 3] = buf[i] >> 4 & 1; |
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dst[8 * j + 4] = buf[i] >> 3 & 1; |
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dst[8 * j + 5] = buf[i] >> 2 & 1; |
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dst[8 * j + 6] = buf[i] >> 1 & 1; |
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dst[8 * j + 7] = buf[i] & 1; |
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row_pix += 8; |
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if (row_pix >= avctx->width) { |
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i += stride - (i % stride) - 1; |
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j += 2 - (j % 2) - 1; |
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row_pix = 0; |
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} |
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} |
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} |
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linesize_align = 16; |
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buf = dst; |
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} else if (context->is_lt_16bpp) { |
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uint8_t *dst = frame->buf[0]->data; |
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int packed = (avctx->codec_tag & 0xFFFFFF) == MKTAG('B','I','T', 0); |
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int swap = avctx->codec_tag >> 24; |
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if (packed && swap) { |
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av_fast_padded_malloc(&context->bitstream_buf, &context->bitstream_buf_size, buf_size); |
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if (!context->bitstream_buf) |
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return AVERROR(ENOMEM); |
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if (swap == 16) |
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context->bbdsp.bswap16_buf(context->bitstream_buf, (const uint16_t*)buf, buf_size / 2); |
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else if (swap == 32) |
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context->bbdsp.bswap_buf(context->bitstream_buf, (const uint32_t*)buf, buf_size / 4); |
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else |
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return AVERROR_INVALIDDATA; |
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buf = context->bitstream_buf; |
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} |
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if (desc->flags & AV_PIX_FMT_FLAG_BE) |
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scale16be(avctx, dst, buf, buf_size, packed); |
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else |
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scale16le(avctx, dst, buf, buf_size, packed); |
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buf = dst; |
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} else if (need_copy) { |
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memcpy(frame->buf[0]->data, buf, buf_size); |
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buf = frame->buf[0]->data; |
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} |
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if (avctx->codec_tag == MKTAG('A', 'V', '1', 'x') || |
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avctx->codec_tag == MKTAG('A', 'V', 'u', 'p')) |
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buf += buf_size - context->frame_size; |
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len = context->frame_size - (avctx->pix_fmt==AV_PIX_FMT_PAL8 ? AVPALETTE_SIZE : 0); |
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if (buf_size < len && ((avctx->codec_tag & 0xFFFFFF) != MKTAG('B','I','T', 0) || !need_copy)) { |
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av_log(avctx, AV_LOG_ERROR, "Invalid buffer size, packet size %d < expected frame_size %d\n", buf_size, len); |
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av_buffer_unref(&frame->buf[0]); |
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return AVERROR(EINVAL); |
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} |
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if ((res = av_image_fill_arrays(frame->data, frame->linesize, |
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buf, avctx->pix_fmt, |
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avctx->width, avctx->height, 1)) < 0) { |
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av_buffer_unref(&frame->buf[0]); |
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return res; |
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} |
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if (avctx->pix_fmt == AV_PIX_FMT_PAL8) { |
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const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, |
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NULL); |
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int ret; |
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if (!context->palette) |
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context->palette = av_buffer_alloc(AVPALETTE_SIZE); |
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if (!context->palette) { |
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av_buffer_unref(&frame->buf[0]); |
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return AVERROR(ENOMEM); |
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} |
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ret = av_buffer_make_writable(&context->palette); |
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if (ret < 0) { |
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av_buffer_unref(&frame->buf[0]); |
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return ret; |
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} |
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if (pal) { |
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memcpy(context->palette->data, pal, AVPALETTE_SIZE); |
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frame->palette_has_changed = 1; |
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} else if (context->is_nut_pal8) { |
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int vid_size = avctx->width * avctx->height; |
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int pal_size = avpkt->size - vid_size; |
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if (avpkt->size > vid_size && pal_size <= AVPALETTE_SIZE) { |
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pal = avpkt->data + vid_size; |
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memcpy(context->palette->data, pal, pal_size); |
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frame->palette_has_changed = 1; |
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} |
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} |
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} |
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if ((avctx->pix_fmt==AV_PIX_FMT_RGB24 || |
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avctx->pix_fmt==AV_PIX_FMT_BGR24 || |
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avctx->pix_fmt==AV_PIX_FMT_GRAY8 || |
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avctx->pix_fmt==AV_PIX_FMT_RGB555LE || |
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avctx->pix_fmt==AV_PIX_FMT_RGB555BE || |
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avctx->pix_fmt==AV_PIX_FMT_RGB565LE || |
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avctx->pix_fmt==AV_PIX_FMT_MONOWHITE || |
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avctx->pix_fmt==AV_PIX_FMT_MONOBLACK || |
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avctx->pix_fmt==AV_PIX_FMT_PAL8) && |
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FFALIGN(frame->linesize[0], linesize_align) * avctx->height <= buf_size) |
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frame->linesize[0] = FFALIGN(frame->linesize[0], linesize_align); |
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|
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if (avctx->pix_fmt == AV_PIX_FMT_NV12 && avctx->codec_tag == MKTAG('N', 'V', '1', '2') && |
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FFALIGN(frame->linesize[0], linesize_align) * avctx->height + |
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FFALIGN(frame->linesize[1], linesize_align) * ((avctx->height + 1) / 2) <= buf_size) { |
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int la0 = FFALIGN(frame->linesize[0], linesize_align); |
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frame->data[1] += (la0 - frame->linesize[0]) * avctx->height; |
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frame->linesize[0] = la0; |
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frame->linesize[1] = FFALIGN(frame->linesize[1], linesize_align); |
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} |
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|
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if ((avctx->pix_fmt == AV_PIX_FMT_PAL8 && buf_size < context->frame_size) || |
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(desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL)) { |
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frame->buf[1] = av_buffer_ref(context->palette); |
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if (!frame->buf[1]) { |
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av_buffer_unref(&frame->buf[0]); |
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return AVERROR(ENOMEM); |
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} |
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frame->data[1] = frame->buf[1]->data; |
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} |
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if (avctx->pix_fmt == AV_PIX_FMT_BGR24 && |
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((frame->linesize[0] + 3) & ~3) * avctx->height <= buf_size) |
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frame->linesize[0] = (frame->linesize[0] + 3) & ~3; |
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|
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if (context->flip) |
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flip(avctx, frame); |
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|
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if (avctx->codec_tag == MKTAG('Y', 'V', '1', '2') || |
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avctx->codec_tag == MKTAG('Y', 'V', '1', '6') || |
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avctx->codec_tag == MKTAG('Y', 'V', '2', '4') || |
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avctx->codec_tag == MKTAG('Y', 'V', 'U', '9')) |
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FFSWAP(uint8_t *, frame->data[1], frame->data[2]); |
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|
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if (avctx->codec_tag == AV_RL32("I420") && (avctx->width+1)*(avctx->height+1) * 3/2 == buf_size) { |
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frame->data[1] = frame->data[1] + (avctx->width+1)*(avctx->height+1) -avctx->width*avctx->height; |
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frame->data[2] = frame->data[2] + ((avctx->width+1)*(avctx->height+1) -avctx->width*avctx->height)*5/4; |
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} |
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|
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if (avctx->codec_tag == AV_RL32("yuv2") && |
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avctx->pix_fmt == AV_PIX_FMT_YUYV422) { |
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int x, y; |
|
uint8_t *line = frame->data[0]; |
|
for (y = 0; y < avctx->height; y++) { |
|
for (x = 0; x < avctx->width; x++) |
|
line[2 * x + 1] ^= 0x80; |
|
line += frame->linesize[0]; |
|
} |
|
} |
|
|
|
if (avctx->codec_tag == AV_RL32("b64a") && |
|
avctx->pix_fmt == AV_PIX_FMT_RGBA64BE) { |
|
uint8_t *dst = frame->data[0]; |
|
uint64_t v; |
|
int x; |
|
for (x = 0; x >> 3 < avctx->width * avctx->height; x += 8) { |
|
v = AV_RB64(&dst[x]); |
|
AV_WB64(&dst[x], v << 16 | v >> 48); |
|
} |
|
} |
|
|
|
if (avctx->field_order > AV_FIELD_PROGRESSIVE) { /* we have interlaced material flagged in container */ |
|
frame->interlaced_frame = 1; |
|
if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB) |
|
frame->top_field_first = 1; |
|
} |
|
|
|
*got_frame = 1; |
|
return buf_size; |
|
} |
|
|
|
static av_cold int raw_close_decoder(AVCodecContext *avctx) |
|
{ |
|
RawVideoContext *context = avctx->priv_data; |
|
|
|
av_buffer_unref(&context->palette); |
|
return 0; |
|
} |
|
|
|
AVCodec ff_rawvideo_decoder = { |
|
.name = "rawvideo", |
|
.long_name = NULL_IF_CONFIG_SMALL("raw video"), |
|
.type = AVMEDIA_TYPE_VIDEO, |
|
.id = AV_CODEC_ID_RAWVIDEO, |
|
.priv_data_size = sizeof(RawVideoContext), |
|
.init = raw_init_decoder, |
|
.close = raw_close_decoder, |
|
.decode = raw_decode, |
|
.priv_class = &rawdec_class, |
|
.capabilities = AV_CODEC_CAP_PARAM_CHANGE, |
|
};
|
|
|