/* * OpenH264 video decoder * Copyright (C) 2016 Martin Storsjo * * This file is part of FFmpeg. * * FFmpeg 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. * * FFmpeg 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 FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include <wels/codec_api.h> #include <wels/codec_ver.h> #include "libavutil/common.h" #include "libavutil/fifo.h" #include "libavutil/imgutils.h" #include "libavutil/intreadwrite.h" #include "libavutil/mathematics.h" #include "libavutil/opt.h" #include "avcodec.h" #include "internal.h" #include "libopenh264.h" typedef struct SVCContext { ISVCDecoder *decoder; } SVCContext; static av_cold int svc_decode_close(AVCodecContext *avctx) { SVCContext *s = avctx->priv_data; if (s->decoder) WelsDestroyDecoder(s->decoder); return 0; } static av_cold int svc_decode_init(AVCodecContext *avctx) { SVCContext *s = avctx->priv_data; SDecodingParam param = { 0 }; int err; int log_level; WelsTraceCallback callback_function; if ((err = ff_libopenh264_check_version(avctx)) < 0) return err; if (WelsCreateDecoder(&s->decoder)) { av_log(avctx, AV_LOG_ERROR, "Unable to create decoder\n"); return AVERROR_UNKNOWN; } // Pass all libopenh264 messages to our callback, to allow ourselves to filter them. log_level = WELS_LOG_DETAIL; callback_function = ff_libopenh264_trace_callback; (*s->decoder)->SetOption(s->decoder, DECODER_OPTION_TRACE_LEVEL, &log_level); (*s->decoder)->SetOption(s->decoder, DECODER_OPTION_TRACE_CALLBACK, (void *)&callback_function); (*s->decoder)->SetOption(s->decoder, DECODER_OPTION_TRACE_CALLBACK_CONTEXT, (void *)&avctx); #if !OPENH264_VER_AT_LEAST(1, 6) param.eOutputColorFormat = videoFormatI420; #endif param.eEcActiveIdc = ERROR_CON_DISABLE; param.sVideoProperty.eVideoBsType = VIDEO_BITSTREAM_DEFAULT; if ((*s->decoder)->Initialize(s->decoder, ¶m) != cmResultSuccess) { av_log(avctx, AV_LOG_ERROR, "Initialize failed\n"); return AVERROR_UNKNOWN; } avctx->pix_fmt = AV_PIX_FMT_YUV420P; return 0; } static int svc_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt) { SVCContext *s = avctx->priv_data; SBufferInfo info = { 0 }; uint8_t* ptrs[3]; int ret, linesize[3]; AVFrame *avframe = data; DECODING_STATE state; state = (*s->decoder)->DecodeFrame2(s->decoder, avpkt->data, avpkt->size, ptrs, &info); if (state != dsErrorFree) { av_log(avctx, AV_LOG_ERROR, "DecodeFrame2 failed\n"); return AVERROR_UNKNOWN; } if (info.iBufferStatus != 1) { av_log(avctx, AV_LOG_DEBUG, "No frame produced\n"); return avpkt->size; } ret = ff_set_dimensions(avctx, info.UsrData.sSystemBuffer.iWidth, info.UsrData.sSystemBuffer.iHeight); if (ret < 0) return ret; // The decoder doesn't (currently) support decoding into a user // provided buffer, so do a copy instead. if (ff_get_buffer(avctx, avframe, 0) < 0) { av_log(avctx, AV_LOG_ERROR, "Unable to allocate buffer\n"); return AVERROR(ENOMEM); } linesize[0] = info.UsrData.sSystemBuffer.iStride[0]; linesize[1] = linesize[2] = info.UsrData.sSystemBuffer.iStride[1]; av_image_copy(avframe->data, avframe->linesize, (const uint8_t **) ptrs, linesize, avctx->pix_fmt, avctx->width, avctx->height); avframe->pts = avpkt->pts; avframe->pkt_dts = avpkt->dts; #if FF_API_PKT_PTS FF_DISABLE_DEPRECATION_WARNINGS avframe->pkt_pts = avpkt->pts; FF_ENABLE_DEPRECATION_WARNINGS #endif *got_frame = 1; return avpkt->size; } AVCodec ff_libopenh264_decoder = { .name = "libopenh264", .long_name = NULL_IF_CONFIG_SMALL("OpenH264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"), .type = AVMEDIA_TYPE_VIDEO, .id = AV_CODEC_ID_H264, .priv_data_size = sizeof(SVCContext), .init = svc_decode_init, .decode = svc_decode_frame, .close = svc_decode_close, // The decoder doesn't currently support B-frames, and the decoder's API // doesn't support reordering/delay, but the BSF could incur delay. .capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_DR1, .caps_internal = FF_CODEC_CAP_SETS_PKT_DTS | FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP, .bsfs = "h264_mp4toannexb", };