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Wed, 12 Apr 2023 12:37:46 +0800 (CST) X-QQ-SSF: 01100000000000Z0Z000000A0000000 X-QQ-FEAT: rGm7xzoh3hlTK5dOg4EF3TwYlw6UENfSpiN6l4T3/lnmB6nqPTXkSzzGBWE9p LklnRMrpg/tclOC0tQR+trJweLAHMFPgPdB2pidLsweL07WsZ70NnoBs/F8jn1jQxlxAzPn Z/KF3xh7Xa5G8XUrCfKD7Sfx6bQuoXmXYrvY7aLS85q6zt3JxqUEJ5s9IQr78J/0rJgauMO j1/dOWlOyqriRp7ogdUN8dCra7W72wNipSsbsUQyZQvINWALxWKrr9Ps/iZxCT0IqvvqV6s B5aIrGO5wbboNbgb8lEjM+KHHWoynkGvcvVodc+Qhv0C4Yy7rkSK/34xNs/OHLsQxJanRMX U94YBUTs889Akz5FrTWSiQTFKljxfSpMqIhPEgUXwKYrw7PmLlqBgYbOgXfdw== X-QQ-GoodBg: 0 X-BIZMAIL-ID: 5323671012326637824 From: Steven Liu To: ffmpeg-devel@ffmpeg.org Date: Wed, 12 Apr 2023 12:37:35 +0800 Message-Id: <20230412043737.8841-2-lq@chinaffmpeg.org> X-Mailer: git-send-email 2.40.0 In-Reply-To: <20230412043737.8841-1-lq@chinaffmpeg.org> References: <20230412043737.8841-1-lq@chinaffmpeg.org> MIME-Version: 1.0 X-QQ-SENDSIZE: 520 Feedback-ID: bizesmtpipv:chinaffmpeg.org:qybglogicsvr:qybglogicsvr2 Subject: [FFmpeg-devel] [PATCH v5 2/4] avformat/flvdec: support demux HEVC in Enhancing FLV X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: FFmpeg development discussions and patches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: FFmpeg development discussions and patches Cc: Steven Liu Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" X-TUID: VJ1tX1WlHBTh Signed-off-by: Steven Liu --- libavformat/flvdec.c | 63 +++++++++++++++++++++++++++++++++++++++----- 1 file changed, 56 insertions(+), 7 deletions(-) diff --git a/libavformat/flvdec.c b/libavformat/flvdec.c index d83edff727..8060c43772 100644 --- a/libavformat/flvdec.c +++ b/libavformat/flvdec.c @@ -79,6 +79,8 @@ typedef struct FLVContext { int64_t last_ts; int64_t time_offset; int64_t time_pos; + + uint8_t exheader; } FLVContext; /* AMF date type */ @@ -302,13 +304,26 @@ static void flv_set_audio_codec(AVFormatContext *s, AVStream *astream, } } -static int flv_same_video_codec(AVCodecParameters *vpar, int flags) +static int flv_same_video_codec(AVFormatContext *s, AVCodecParameters *vpar, int flags) { int flv_codecid = flags & FLV_VIDEO_CODECID_MASK; + FLVContext *flv = s->priv_data; if (!vpar->codec_id && !vpar->codec_tag) return 1; + if (flv->exheader) { + uint8_t *codec_id_str = (uint8_t *)s->pb->buf_ptr; + uint32_t codec_id = codec_id_str[3] | codec_id_str[2] << 8 | codec_id_str[1] << 16 | codec_id_str[0] << 24; + switch(codec_id) { + case MKBETAG('h', 'v', 'c', '1'): + flv_codecid = FLV_CODECID_HEVC; + break; + default: + break; + } + } + switch (flv_codecid) { case FLV_CODECID_H263: return vpar->codec_id == AV_CODEC_ID_FLV1; @@ -322,6 +337,8 @@ static int flv_same_video_codec(AVCodecParameters *vpar, int flags) return vpar->codec_id == AV_CODEC_ID_VP6A; case FLV_CODECID_H264: return vpar->codec_id == AV_CODEC_ID_H264; + case FLV_CODECID_HEVC: + return vpar->codec_id == AV_CODEC_ID_HEVC; default: return vpar->codec_tag == flv_codecid; } @@ -331,9 +348,23 @@ static int flv_set_video_codec(AVFormatContext *s, AVStream *vstream, int flv_codecid, int read) { FFStream *const vstreami = ffstream(vstream); + FLVContext *flv = s->priv_data; int ret = 0; AVCodecParameters *par = vstream->codecpar; enum AVCodecID old_codec_id = vstream->codecpar->codec_id; + flv_codecid &= FLV_VIDEO_CODECID_MASK; + + if (flv->exheader) { + uint32_t codec_id = avio_rb32(s->pb); + + switch(codec_id) { + case MKBETAG('h', 'v', 'c', '1'): + flv_codecid = FLV_CODECID_HEVC; + break; + default: + break; + } + } switch (flv_codecid) { case FLV_CODECID_H263: par->codec_id = AV_CODEC_ID_FLV1; @@ -372,6 +403,11 @@ static int flv_set_video_codec(AVFormatContext *s, AVStream *vstream, par->codec_id = AV_CODEC_ID_MPEG4; ret = 3; break; + case FLV_CODECID_HEVC: + par->codec_id = AV_CODEC_ID_HEVC; + vstreami->need_parsing = AVSTREAM_PARSE_HEADERS; + ret = 3; + break; default: avpriv_request_sample(s, "Video codec (%x)", flv_codecid); par->codec_tag = flv_codecid; @@ -796,6 +832,7 @@ static int flv_read_header(AVFormatContext *s) s->start_time = 0; flv->sum_flv_tag_size = 0; flv->last_keyframe_stream_index = -1; + flv->exheader = 0; return 0; } @@ -1071,6 +1108,11 @@ retry: } else if (type == FLV_TAG_TYPE_VIDEO) { stream_type = FLV_STREAM_TYPE_VIDEO; flags = avio_r8(s->pb); + /* + * Reference Enhancing FLV 2023-03-v1.0.0-B.8 + * https://github.com/veovera/enhanced-rtmp/blob/main/enhanced-rtmp-v1.pdf + * */ + flv->exheader = (flags >> 7) & 1; size--; if ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_VIDEO_INFO_CMD) goto skip; @@ -1129,7 +1171,7 @@ skip: break; } else if (stream_type == FLV_STREAM_TYPE_VIDEO) { if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && - (s->video_codec_id || flv_same_video_codec(st->codecpar, flags))) + (s->video_codec_id || flv_same_video_codec(s, st->codecpar, flags))) break; } else if (stream_type == FLV_STREAM_TYPE_SUBTITLE) { if (st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE) @@ -1230,7 +1272,7 @@ retry_duration: avcodec_parameters_free(&par); } } else if (stream_type == FLV_STREAM_TYPE_VIDEO) { - int ret = flv_set_video_codec(s, st, flags & FLV_VIDEO_CODECID_MASK, 1); + int ret = flv_set_video_codec(s, st, flags, 1); if (ret < 0) return ret; size -= ret; @@ -1242,8 +1284,14 @@ retry_duration: if (st->codecpar->codec_id == AV_CODEC_ID_AAC || st->codecpar->codec_id == AV_CODEC_ID_H264 || - st->codecpar->codec_id == AV_CODEC_ID_MPEG4) { - int type = avio_r8(s->pb); + st->codecpar->codec_id == AV_CODEC_ID_MPEG4 || + st->codecpar->codec_id == AV_CODEC_ID_HEVC) { + int type = 0; + if (flv->exheader) { + type = flags & 0x0F; + } else { + type = avio_r8(s->pb); + } size--; if (size < 0) { @@ -1251,7 +1299,8 @@ retry_duration: goto leave; } - if (st->codecpar->codec_id == AV_CODEC_ID_H264 || st->codecpar->codec_id == AV_CODEC_ID_MPEG4) { + if (st->codecpar->codec_id == AV_CODEC_ID_H264 || st->codecpar->codec_id == AV_CODEC_ID_MPEG4 + || (st->codecpar->codec_id == AV_CODEC_ID_HEVC && (flags & 0x0F))) { // sign extension int32_t cts = (avio_rb24(s->pb) + 0xff800000) ^ 0xff800000; pts = av_sat_add64(dts, cts); @@ -1267,7 +1316,7 @@ retry_duration: } } if (type == 0 && (!st->codecpar->extradata || st->codecpar->codec_id == AV_CODEC_ID_AAC || - st->codecpar->codec_id == AV_CODEC_ID_H264)) { + st->codecpar->codec_id == AV_CODEC_ID_H264 || st->codecpar->codec_id == AV_CODEC_ID_HEVC)) { AVDictionaryEntry *t; if (st->codecpar->extradata) {