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[73.110.121.59]) by smtp.gmail.com with ESMTPSA id 196sm4382274iou.50.2017.08.02.00.17.23 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 02 Aug 2017 00:17:23 -0700 (PDT) From: Rodger Combs To: ffmpeg-devel@ffmpeg.org Date: Wed, 2 Aug 2017 01:30:43 -0500 Message-Id: <1501655445-18976-5-git-send-email-rodger.combs@gmail.com> X-Mailer: git-send-email 2.6.4 In-Reply-To: <1501655445-18976-1-git-send-email-rodger.combs@gmail.com> References: <1501655445-18976-1-git-send-email-rodger.combs@gmail.com> Subject: [FFmpeg-devel] [PATCH 5/7] lavf/flacenc: support writing attached pictures X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.20 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 MIME-Version: 1.0 Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" --- libavformat/flacenc.c | 285 +++++++++++++++++++++++++++++++++++++++++++------- 1 file changed, 250 insertions(+), 35 deletions(-) diff --git a/libavformat/flacenc.c b/libavformat/flacenc.c index b894f9e..9768b6a 100644 --- a/libavformat/flacenc.c +++ b/libavformat/flacenc.c @@ -21,10 +21,13 @@ #include "libavutil/channel_layout.h" #include "libavutil/opt.h" +#include "libavutil/pixdesc.h" #include "libavcodec/flac.h" #include "avformat.h" #include "avio_internal.h" #include "flacenc.h" +#include "id3v2.h" +#include "internal.h" #include "vorbiscomment.h" #include "libavcodec/bytestream.h" @@ -33,8 +36,16 @@ typedef struct FlacMuxerContext { const AVClass *class; int write_header; + int audio_stream_idx; + AVPacket *pics; + int nb_pics, waiting_pics; + /* audio packets are queued here until we get all the attached pictures */ + AVPacketList *queue, *queue_end; + /* updated streaminfo sent by the encoder at the end */ uint8_t *streaminfo; + + unsigned attached_types; } FlacMuxerContext; static int flac_write_block_padding(AVIOContext *pb, unsigned int n_padding_bytes, @@ -74,31 +85,156 @@ static int flac_write_block_comment(AVIOContext *pb, AVDictionary **m, return 0; } -static int flac_write_header(struct AVFormatContext *s) +static int flac_write_picture(struct AVFormatContext *s, AVPacket *pkt) { - int ret; - int padding = s->metadata_header_padding; - AVCodecParameters *par = s->streams[0]->codecpar; - FlacMuxerContext *c = s->priv_data; - - if (!c->write_header) + FlacMuxerContext *c = s->priv_data; + AVIOContext *pb = s->pb; + const AVPixFmtDescriptor *pixdesc; + const CodecMime *mime = ff_id3v2_mime_tags; + AVDictionaryEntry *e; + const char *mimetype = NULL, *desc = ""; + const AVStream *st = s->streams[pkt->stream_index]; + int i, mimelen, desclen, type = 0; + + if (!pkt->data) return 0; - if (s->nb_streams > 1) { - av_log(s, AV_LOG_ERROR, "only one stream is supported\n"); + while (mime->id != AV_CODEC_ID_NONE) { + if (mime->id == st->codecpar->codec_id) { + mimetype = mime->str; + break; + } + mime++; + } + if (!mimetype) { + av_log(s, AV_LOG_ERROR, "No mimetype is known for stream %d, cannot " + "write an attached picture.\n", st->index); return AVERROR(EINVAL); } - if (par->codec_id != AV_CODEC_ID_FLAC) { - av_log(s, AV_LOG_ERROR, "unsupported codec\n"); + mimelen = strlen(mimetype); + + /* get the picture type */ + e = av_dict_get(st->metadata, "comment", NULL, 0); + for (i = 0; e && i < FF_ARRAY_ELEMS(ff_id3v2_picture_types); i++) { + if (!av_strcasecmp(e->value, ff_id3v2_picture_types[i])) { + type = i; + break; + } + } + + if ((c->attached_types & (1 << type)) & 0x6) { + av_log(s, AV_LOG_ERROR, "Duplicate attachment for type '%s'\n", ff_id3v2_picture_types[type]); + return AVERROR(EINVAL); + } + + if (type == 1 && (st->codecpar->codec_id != AV_CODEC_ID_PNG || + st->codecpar->width != 32 || + st->codecpar->height != 32)) { + av_log(s, AV_LOG_ERROR, "File icon attachment must be a 32x32 PNG"); return AVERROR(EINVAL); } + c->attached_types |= (1 << type); + + /* get the description */ + if ((e = av_dict_get(st->metadata, "title", NULL, 0))) + desc = e->value; + desclen = strlen(desc); + + avio_w8(pb, 0x06); + avio_wb24(pb, 4 + 4 + mimelen + 4 + desclen + 4 + 4 + 4 + 4 + 4 + pkt->size); + + avio_wb32(pb, type); + + avio_wb32(pb, mimelen); + avio_write(pb, mimetype, mimelen); + + avio_wb32(pb, desclen); + avio_write(pb, desc, desclen); + + avio_wb32(pb, st->codecpar->width); + avio_wb32(pb, st->codecpar->height); + if ((pixdesc = av_pix_fmt_desc_get(st->codecpar->format))) + avio_wb32(pb, av_get_bits_per_pixel(pixdesc)); + else + avio_wb32(pb, 0); + avio_wb32(pb, 0); + + avio_wb32(pb, pkt->size); + avio_write(pb, pkt->data, pkt->size); + return 0; +} + +static int flac_finish_header(struct AVFormatContext *s) +{ + FlacMuxerContext *c = s->priv_data; + int i, ret, padding = s->metadata_header_padding; if (padding < 0) padding = 8192; /* The FLAC specification states that 24 bits are used to represent the * size of a metadata block so we must clip this value to 2^24-1. */ padding = av_clip_uintp2(padding, 24); + for (i = 0; i < c->nb_pics; i++) { + ret = flac_write_picture(s, &c->pics[i]); + if (ret) + return ret; + } + + ret = flac_write_block_comment(s->pb, &s->metadata, !padding, + s->flags & AVFMT_FLAG_BITEXACT); + if (ret) + return ret; + + /* The command line flac encoder defaults to placing a seekpoint + * every 10s. So one might add padding to allow that later + * but there seems to be no simple way to get the duration here. + * So just add the amount requested by the user. */ + if (padding) + flac_write_block_padding(s->pb, padding, 1); + + return 0; +} + +static int flac_write_header(struct AVFormatContext *s) +{ + int ret, i; + AVCodecParameters *par; + FlacMuxerContext *c = s->priv_data; + + c->audio_stream_idx = -1; + for (i = 0; i < s->nb_streams; i++) { + AVStream *st = s->streams[i]; + if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) { + if (c->audio_stream_idx >= 0 || st->codecpar->codec_id != AV_CODEC_ID_FLAC) { + av_log(s, AV_LOG_ERROR, "Invalid audio stream. Exactly one FLAC " + "audio stream is required.\n"); + return AVERROR(EINVAL); + } + par = s->streams[i]->codecpar; + c->audio_stream_idx = i; + } else if (st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO) { + av_log(s, AV_LOG_ERROR, "Only audio streams and pictures are allowed in FLAC.\n"); + return AVERROR(EINVAL); + } else if (st->codecpar->codec_id == AV_CODEC_ID_GIF) { + av_log(s, AV_LOG_ERROR, "GIF image support is not implemented.\n"); + return AVERROR_PATCHWELCOME; + } else if (!c->write_header) { + av_log(s, AV_LOG_ERROR, "Can't write attached pictures without a header.\n"); + return AVERROR(EINVAL); + } + } + if (c->audio_stream_idx < 0) { + av_log(s, AV_LOG_ERROR, "No audio stream present.\n"); + return AVERROR(EINVAL); + } + c->waiting_pics = c->nb_pics = s->nb_streams - 1; + if (c->nb_pics && !(c->pics = av_calloc(c->nb_pics, sizeof(AVPacket)))) + return AVERROR(ENOMEM); + + if (!c->write_header) + return 0; + ret = ff_flac_write_header(s->pb, par->extradata, par->extradata_size, 0); if (ret) @@ -121,18 +257,51 @@ static int flac_write_header(struct AVFormatContext *s) } } - ret = flac_write_block_comment(s->pb, &s->metadata, !padding, - s->flags & AVFMT_FLAG_BITEXACT); - if (ret) - return ret; + if (!c->waiting_pics) + ret = flac_finish_header(s); - /* The command line flac encoder defaults to placing a seekpoint - * every 10s. So one might add padding to allow that later - * but there seems to be no simple way to get the duration here. - * So just add the amount requested by the user. */ - if (padding) - flac_write_block_padding(s->pb, padding, 1); + return ret; +} + +static int flac_write_audio_packet(struct AVFormatContext *s, AVPacket *pkt) +{ + FlacMuxerContext *c = s->priv_data; + uint8_t *streaminfo; + int streaminfo_size; + + /* check for updated streaminfo */ + streaminfo = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA, + &streaminfo_size); + if (streaminfo && streaminfo_size == FLAC_STREAMINFO_SIZE) { + av_freep(&c->streaminfo); + + c->streaminfo = av_malloc(FLAC_STREAMINFO_SIZE); + if (!c->streaminfo) + return AVERROR(ENOMEM); + memcpy(c->streaminfo, streaminfo, FLAC_STREAMINFO_SIZE); + } + + if (pkt->size) + avio_write(s->pb, pkt->data, pkt->size); + return 0; +} + +static int flac_queue_flush(AVFormatContext *s) +{ + FlacMuxerContext *c = s->priv_data; + AVPacketList *pktl; + int ret = 0, write = 1; + flac_finish_header(s); + + while ((pktl = c->queue)) { + if (write && (ret = flac_write_audio_packet(s, &pktl->pkt)) < 0) + write = 0; + av_packet_unref(&pktl->pkt); + c->queue = pktl->next; + av_freep(&pktl); + } + c->queue_end = NULL; return ret; } @@ -144,6 +313,12 @@ static int flac_write_trailer(struct AVFormatContext *s) uint8_t *streaminfo = c->streaminfo ? c->streaminfo : s->streams[0]->codecpar->extradata; + if (c->waiting_pics) { + av_log(s, AV_LOG_WARNING, "No packets were sent for some of the " + "attached pictures.\n"); + flac_queue_flush(s); + } + if (!c->write_header || !streaminfo) return 0; @@ -166,23 +341,63 @@ static int flac_write_trailer(struct AVFormatContext *s) static int flac_write_packet(struct AVFormatContext *s, AVPacket *pkt) { FlacMuxerContext *c = s->priv_data; - uint8_t *streaminfo; - int streaminfo_size; + if (pkt->stream_index == c->audio_stream_idx) { + if (c->waiting_pics) { + /* buffer audio packets until we get all the pictures */ + AVPacketList *pktl = av_mallocz(sizeof(*pktl)); + int ret; + if (!pktl) { + ret = AVERROR(ENOMEM); +oom: + if (s->error_recognition & AV_EF_EXPLODE) { + av_free(pktl); + return ret; + } + av_log(s, AV_LOG_ERROR, "Out of memory in packet queue; skipping attached pictures\n"); + c->waiting_pics = 0; + if ((ret = flac_queue_flush(s)) < 0) + return ret; + return flac_write_audio_packet(s, pkt); + } + + ret = av_packet_ref(&pktl->pkt, pkt); + if (ret < 0) { + av_freep(&pktl); + goto oom; + } + + if (c->queue_end) + c->queue_end->next = pktl; + else + c->queue = pktl; + c->queue_end = pktl; + } else { + return flac_write_audio_packet(s, pkt); + } + } else { + int ret, index = pkt->stream_index; - /* check for updated streaminfo */ - streaminfo = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA, - &streaminfo_size); - if (streaminfo && streaminfo_size == FLAC_STREAMINFO_SIZE) { - av_freep(&c->streaminfo); + /* warn only once for each stream */ + if (s->streams[pkt->stream_index]->nb_frames == 1) { + av_log(s, AV_LOG_WARNING, "Got more than one picture in stream %d," + " ignoring.\n", pkt->stream_index); + } + if (!c->waiting_pics || s->streams[pkt->stream_index]->nb_frames >= 1) + return 0; - c->streaminfo = av_malloc(FLAC_STREAMINFO_SIZE); - if (!c->streaminfo) - return AVERROR(ENOMEM); - memcpy(c->streaminfo, streaminfo, FLAC_STREAMINFO_SIZE); + if (index > c->audio_stream_idx) + index--; + + if ((ret = av_copy_packet(&c->pics[index], pkt)) < 0) + return ret; + c->waiting_pics--; + + /* flush the buffered audio packets */ + if (!c->waiting_pics && + (ret = flac_queue_flush(s)) < 0) + return ret; } - if (pkt->size) - avio_write(s->pb, pkt->data, pkt->size); return 0; } @@ -205,7 +420,7 @@ AVOutputFormat ff_flac_muxer = { .mime_type = "audio/x-flac", .extensions = "flac", .audio_codec = AV_CODEC_ID_FLAC, - .video_codec = AV_CODEC_ID_NONE, + .video_codec = AV_CODEC_ID_PNG, .write_header = flac_write_header, .write_packet = flac_write_packet, .write_trailer = flac_write_trailer,