While it is less featureful (and slower) than the built-in H264 decoder, one could potentially want to use it to take advantage of the cisco patent license offer. Signed-off-by: Martin Storsjö <martin@martin.st>pull/241/head
Martin Storsjö
9 years ago
parent
785c25443b
commit
82b7525173
10 changed files with 369 additions and 46 deletions
@ -0,0 +1,62 @@ |
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/*
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* OpenH264 shared utils |
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* Copyright (C) 2014 Martin Storsjo |
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* |
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* This file is part of Libav. |
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* |
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* Libav 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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* Libav 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 Libav; 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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#include <string.h> |
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#include <wels/codec_api.h> |
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#include <wels/codec_ver.h> |
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#include "libavutil/log.h" |
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#include "libopenh264.h" |
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// Convert libopenh264 log level to equivalent libav log level.
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static int libopenh264_to_libav_log_level(int libopenh264_log_level) |
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{ |
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if (libopenh264_log_level >= WELS_LOG_DETAIL) return AV_LOG_TRACE; |
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else if (libopenh264_log_level >= WELS_LOG_DEBUG) return AV_LOG_DEBUG; |
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else if (libopenh264_log_level >= WELS_LOG_INFO) return AV_LOG_VERBOSE; |
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else if (libopenh264_log_level >= WELS_LOG_WARNING) return AV_LOG_WARNING; |
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else if (libopenh264_log_level >= WELS_LOG_ERROR) return AV_LOG_ERROR; |
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else return AV_LOG_QUIET; |
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} |
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void ff_libopenh264_trace_callback(void *ctx, int level, const char *msg) |
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{ |
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// The message will be logged only if the requested EQUIVALENT libav log level is
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// less than or equal to the current libav log level.
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int equiv_libav_log_level = libopenh264_to_libav_log_level(level); |
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av_log(ctx, equiv_libav_log_level, "%s\n", msg); |
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} |
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int ff_libopenh264_check_version(void *logctx) |
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{ |
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// Mingw GCC < 4.7 on x86_32 uses an incorrect/buggy ABI for the WelsGetCodecVersion
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// function (for functions returning larger structs), thus skip the check in those
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// configurations.
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#if !defined(_WIN32) || !defined(__GNUC__) || !ARCH_X86_32 || AV_GCC_VERSION_AT_LEAST(4, 7) |
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OpenH264Version libver = WelsGetCodecVersion(); |
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if (memcmp(&libver, &g_stCodecVersion, sizeof(libver))) { |
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av_log(logctx, AV_LOG_ERROR, "Incorrect library version loaded\n"); |
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return AVERROR(EINVAL); |
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} |
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#endif |
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return 0; |
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} |
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@ -0,0 +1,39 @@ |
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/*
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* OpenH264 shared utils |
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* Copyright (C) 2014 Martin Storsjo |
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* |
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* This file is part of Libav. |
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* |
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* Libav 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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* Libav 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 Libav; 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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#ifndef AVCODEC_LIBOPENH264_H |
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#define AVCODEC_LIBOPENH264_H |
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#define OPENH264_VER_AT_LEAST(maj, min) \ |
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((OPENH264_MAJOR > (maj)) || \
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(OPENH264_MAJOR == (maj) && OPENH264_MINOR >= (min))) |
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// This function will be provided to the libopenh264 library. The function will be called
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// when libopenh264 wants to log a message (error, warning, info, etc.). The signature for
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// this function (defined in .../codec/api/svc/codec_api.h) is:
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//
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// typedef void (*WelsTraceCallback) (void* ctx, int level, const char* string);
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void ff_libopenh264_trace_callback(void *ctx, int level, const char *msg); |
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int ff_libopenh264_check_version(void *logctx); |
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#endif /* AVCODEC_LIBOPENH264_H */ |
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@ -0,0 +1,245 @@ |
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/*
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* OpenH264 video decoder |
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* Copyright (C) 2016 Martin Storsjo |
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* |
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* This file is part of Libav. |
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* |
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* Libav 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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* Libav 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 Libav; 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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#include <wels/codec_api.h> |
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#include <wels/codec_ver.h> |
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#include "libavutil/common.h" |
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#include "libavutil/fifo.h" |
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#include "libavutil/imgutils.h" |
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#include "libavutil/intreadwrite.h" |
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#include "libavutil/mathematics.h" |
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#include "libavutil/opt.h" |
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#include "avcodec.h" |
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#include "internal.h" |
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#include "libopenh264.h" |
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typedef struct SVCContext { |
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ISVCDecoder *decoder; |
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AVBSFContext *bsf; |
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AVFifoBuffer *packet_fifo; |
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AVPacket pkt_filtered; |
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} SVCContext; |
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static av_cold int svc_decode_close(AVCodecContext *avctx) |
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{ |
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SVCContext *s = avctx->priv_data; |
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AVPacket pkt; |
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if (s->decoder) |
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WelsDestroyDecoder(s->decoder); |
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while (av_fifo_size(s->packet_fifo) >= sizeof(pkt)) { |
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av_fifo_generic_read(s->packet_fifo, &pkt, sizeof(pkt), NULL); |
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av_packet_unref(&pkt); |
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} |
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av_bsf_free(&s->bsf); |
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av_packet_unref(&s->pkt_filtered); |
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av_fifo_free(s->packet_fifo); |
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return 0; |
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} |
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static av_cold int svc_decode_init(AVCodecContext *avctx) |
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{ |
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SVCContext *s = avctx->priv_data; |
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SDecodingParam param = { 0 }; |
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int err; |
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int log_level; |
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WelsTraceCallback callback_function; |
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if ((err = ff_libopenh264_check_version(avctx)) < 0) |
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return err; |
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s->packet_fifo = av_fifo_alloc(sizeof(AVPacket)); |
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if (!s->packet_fifo) { |
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err = AVERROR(ENOMEM); |
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goto fail; |
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} |
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if (WelsCreateDecoder(&s->decoder)) { |
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av_log(avctx, AV_LOG_ERROR, "Unable to create decoder\n"); |
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err = AVERROR_UNKNOWN; |
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goto fail; |
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} |
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// Pass all libopenh264 messages to our callback, to allow ourselves to filter them.
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log_level = WELS_LOG_DETAIL; |
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callback_function = ff_libopenh264_trace_callback; |
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(*s->decoder)->SetOption(s->decoder, DECODER_OPTION_TRACE_LEVEL, &log_level); |
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(*s->decoder)->SetOption(s->decoder, DECODER_OPTION_TRACE_CALLBACK, (void *)&callback_function); |
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(*s->decoder)->SetOption(s->decoder, DECODER_OPTION_TRACE_CALLBACK_CONTEXT, (void *)&avctx); |
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param.eOutputColorFormat = videoFormatI420; |
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param.eEcActiveIdc = ERROR_CON_DISABLE; |
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param.sVideoProperty.eVideoBsType = VIDEO_BITSTREAM_DEFAULT; |
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if ((*s->decoder)->Initialize(s->decoder, ¶m) != cmResultSuccess) { |
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av_log(avctx, AV_LOG_ERROR, "Initialize failed\n"); |
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err = AVERROR_UNKNOWN; |
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goto fail; |
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} |
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avctx->pix_fmt = AV_PIX_FMT_YUV420P; |
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fail: |
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return err; |
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} |
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static int init_bsf(AVCodecContext *avctx) |
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{ |
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SVCContext *s = avctx->priv_data; |
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const AVBitStreamFilter *filter; |
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int ret; |
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if (s->bsf) |
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return 0; |
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// If the input stream already is annex b, this BSF only passes the
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// packets through unchanged.
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filter = av_bsf_get_by_name("h264_mp4toannexb"); |
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if (!filter) |
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return AVERROR_BUG; |
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ret = av_bsf_alloc(filter, &s->bsf); |
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if (ret < 0) |
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return ret; |
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ret = avcodec_parameters_from_context(s->bsf->par_in, avctx); |
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if (ret < 0) |
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return ret; |
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s->bsf->time_base_in = avctx->time_base; |
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ret = av_bsf_init(s->bsf); |
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if (ret < 0) |
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return ret; |
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return ret; |
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} |
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static int svc_decode_frame(AVCodecContext *avctx, void *data, |
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int *got_frame, AVPacket *avpkt) |
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{ |
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SVCContext *s = avctx->priv_data; |
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SBufferInfo info = { 0 }; |
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uint8_t* ptrs[3]; |
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int linesize[3]; |
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AVFrame *avframe = data; |
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int ret; |
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DECODING_STATE state; |
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if ((ret = init_bsf(avctx)) < 0) |
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return ret; |
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if (avpkt->size) { |
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AVPacket input_ref = { 0 }; |
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if (av_fifo_space(s->packet_fifo) < sizeof(input_ref)) { |
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ret = av_fifo_realloc2(s->packet_fifo, |
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av_fifo_size(s->packet_fifo) + sizeof(input_ref)); |
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if (ret < 0) |
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return ret; |
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} |
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ret = av_packet_ref(&input_ref, avpkt); |
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if (ret < 0) |
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return ret; |
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av_fifo_generic_write(s->packet_fifo, &input_ref, sizeof(input_ref), NULL); |
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} |
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while (!*got_frame) { |
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/* prepare the input data -- convert to Annex B if needed */ |
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if (s->pkt_filtered.size <= 0) { |
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AVPacket input_ref; |
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/* no more data */ |
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if (av_fifo_size(s->packet_fifo) < sizeof(AVPacket)) |
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return avpkt->size ? avpkt->size : 0; |
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av_packet_unref(&s->pkt_filtered); |
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av_fifo_generic_read(s->packet_fifo, &input_ref, sizeof(input_ref), NULL); |
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ret = av_bsf_send_packet(s->bsf, &input_ref); |
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if (ret < 0) { |
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av_packet_unref(&input_ref); |
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return ret; |
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} |
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ret = av_bsf_receive_packet(s->bsf, &s->pkt_filtered); |
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if (ret < 0) |
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av_packet_move_ref(&s->pkt_filtered, &input_ref); |
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else |
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av_packet_unref(&input_ref); |
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} |
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state = (*s->decoder)->DecodeFrame2(s->decoder, s->pkt_filtered.data, s->pkt_filtered.size, ptrs, &info); |
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s->pkt_filtered.size = 0; |
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if (state != dsErrorFree) { |
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av_log(avctx, AV_LOG_ERROR, "DecodeFrame2 failed\n"); |
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return AVERROR_UNKNOWN; |
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} |
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if (info.iBufferStatus != 1) { |
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av_log(avctx, AV_LOG_DEBUG, "No frame produced\n"); |
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continue; |
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} |
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ff_set_dimensions(avctx, info.UsrData.sSystemBuffer.iWidth, info.UsrData.sSystemBuffer.iHeight); |
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// The decoder doesn't (currently) support decoding into a user
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// provided buffer, so do a copy instead.
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if (ff_get_buffer(avctx, avframe, 0) < 0) { |
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av_log(avctx, AV_LOG_ERROR, "Unable to allocate buffer\n"); |
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return AVERROR(ENOMEM); |
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} |
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linesize[0] = info.UsrData.sSystemBuffer.iStride[0]; |
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linesize[1] = linesize[2] = info.UsrData.sSystemBuffer.iStride[1]; |
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av_image_copy(avframe->data, avframe->linesize, (const uint8_t **) ptrs, linesize, avctx->pix_fmt, avctx->width, avctx->height); |
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avframe->pts = s->pkt_filtered.pts; |
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avframe->pkt_dts = s->pkt_filtered.dts; |
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#if FF_API_PKT_PTS |
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FF_DISABLE_DEPRECATION_WARNINGS |
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avframe->pkt_pts = s->pkt_filtered.pts; |
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FF_ENABLE_DEPRECATION_WARNINGS |
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#endif |
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*got_frame = 1; |
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} |
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return avpkt->size; |
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} |
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AVCodec ff_libopenh264_decoder = { |
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.name = "libopenh264", |
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.long_name = NULL_IF_CONFIG_SMALL("OpenH264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"), |
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.type = AVMEDIA_TYPE_VIDEO, |
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.id = AV_CODEC_ID_H264, |
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.priv_data_size = sizeof(SVCContext), |
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.init = svc_decode_init, |
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.decode = svc_decode_frame, |
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.close = svc_decode_close, |
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// The decoder doesn't currently support B-frames, and the decoder's API
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// doesn't support reordering/delay, but the BSF could incur delay.
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.capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_DR1, |
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.caps_internal = FF_CODEC_CAP_SETS_PKT_DTS | FF_CODEC_CAP_INIT_THREADSAFE | |
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FF_CODEC_CAP_INIT_CLEANUP, |
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}; |
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