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Code Issues Releases Activity

flacdec: read attached pictures.

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This commit is contained in:
Anton Khirnov
2012-06-15 14:39:23 +02:00
parent a5db8e4a1a
commit ae702edf43
1 changed files with 123 additions and 0 deletions
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123
libavformat/flacdec.c
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@@ -21,12 +21,127 @@
#include "libavcodec/flac.h"
#include "avformat.h"
#include "id3v2.h"
#include "internal.h"
#include "rawdec.h"
#include "oggdec.h"
#include "vorbiscomment.h"
#include "libavcodec/bytestream.h"
static int parse_picture(AVFormatContext *s, uint8_t *buf, int buf_size)
{
const CodecMime *mime = ff_id3v2_mime_tags;
enum CodecID id = CODEC_ID_NONE;
uint8_t mimetype[64], *desc = NULL, *data = NULL;
AVIOContext *pb = NULL;
AVStream *st;
int type, width, height;
int len, ret = 0;
st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
pb = avio_alloc_context(buf, buf_size, 0, NULL, NULL, NULL, NULL);
if (!pb)
return AVERROR(ENOMEM);
/* read the picture type */
type = avio_rb32(pb);
if (type >= FF_ARRAY_ELEMS(ff_id3v2_picture_types) || type < 0) {
av_log(s, AV_LOG_ERROR, "Invalid picture type: %d.\n", type);
ret = AVERROR_INVALIDDATA;
goto fail;
}
/* picture mimetype */
len = avio_rb32(pb);
if (len <= 0 ||
avio_read(pb, mimetype, FFMIN(len, sizeof(mimetype) - 1)) != len) {
av_log(s, AV_LOG_ERROR, "Could not read mimetype from an attached "
"picture.\n");
ret = AVERROR_INVALIDDATA;
goto fail;
}
mimetype[len] = 0;
while (mime->id != CODEC_ID_NONE) {
if (!strncmp(mime->str, mimetype, sizeof(mimetype))) {
id = mime->id;
break;
}
mime++;
}
if (id == CODEC_ID_NONE) {
av_log(s, AV_LOG_ERROR, "Unknown attached picture mimetype: %s.\n",
mimetype);
ret = AVERROR_INVALIDDATA;
goto fail;
}
/* picture description */
len = avio_rb32(pb);
if (len > 0) {
if (!(desc = av_malloc(len + 1))) {
ret = AVERROR(ENOMEM);
goto fail;
}
if (avio_read(pb, desc, len) != len) {
ret = AVERROR(EIO);
goto fail;
}
desc[len] = 0;
}
/* picture metadata */
width = avio_rb32(pb);
height = avio_rb32(pb);
avio_skip(pb, 8);
/* picture data */
len = avio_rb32(pb);
if (len <= 0) {
ret = AVERROR_INVALIDDATA;
goto fail;
}
if (!(data = av_malloc(len))) {
ret = AVERROR(ENOMEM);
goto fail;
}
if (avio_read(pb, data, len) != len) {
ret = AVERROR(EIO);
goto fail;
}
av_init_packet(&st->attached_pic);
st->attached_pic.data = data;
st->attached_pic.size = len;
st->attached_pic.destruct = av_destruct_packet;
st->attached_pic.stream_index = st->index;
st->attached_pic.flags |= AV_PKT_FLAG_KEY;
st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
st->codec->codec_id = id;
st->codec->width = width;
st->codec->height = height;
av_dict_set(&st->metadata, "comment", ff_id3v2_picture_types[type], 0);
if (desc)
av_dict_set(&st->metadata, "title", desc, AV_DICT_DONT_STRDUP_VAL);
av_freep(&pb);
return 0;
fail:
av_freep(&desc);
av_freep(&data);
av_freep(&pb);
return ret;
}
static int flac_read_header(AVFormatContext *s)
{
int ret, metadata_last=0, metadata_type, metadata_size, found_streaminfo=0;
@@ -55,6 +170,7 @@ static int flac_read_header(AVFormatContext *s)
/* allocate and read metadata block for supported types */
case FLAC_METADATA_TYPE_STREAMINFO:
case FLAC_METADATA_TYPE_CUESHEET:
case FLAC_METADATA_TYPE_PICTURE:
case FLAC_METADATA_TYPE_VORBIS_COMMENT:
buffer = av_mallocz(metadata_size + FF_INPUT_BUFFER_PADDING_SIZE);
if (!buffer) {
@@ -121,6 +237,13 @@ static int flac_read_header(AVFormatContext *s)
offset += ti * 12;
avpriv_new_chapter(s, track, st->time_base, start, AV_NOPTS_VALUE, isrc);
}
} else if (metadata_type == FLAC_METADATA_TYPE_PICTURE) {
ret = parse_picture(s, buffer, metadata_size);
av_freep(&buffer);
if (ret < 0) {
av_log(s, AV_LOG_ERROR, "Error parsing attached picture.\n");
return ret;
}
} else {
/* STREAMINFO must be the first block */
if (!found_streaminfo) {