mirror of
https://git.videolan.org/git/ffmpeg.git
synced 2024-08-28 20:26:14 +02:00
159 lines
4.8 KiB
C
159 lines
4.8 KiB
C
/*
|
|
* Raw FLAC picture parser
|
|
* Copyright (c) 2001 Fabrice Bellard
|
|
*
|
|
* 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 "libavutil/avassert.h"
|
|
#include "libavutil/intreadwrite.h"
|
|
#include "libavcodec/png.h"
|
|
#include "avformat.h"
|
|
#include "flac_picture.h"
|
|
#include "id3v2.h"
|
|
#include "internal.h"
|
|
|
|
int ff_flac_parse_picture(AVFormatContext *s, uint8_t *buf, int buf_size)
|
|
{
|
|
const CodecMime *mime = ff_id3v2_mime_tags;
|
|
enum AVCodecID id = AV_CODEC_ID_NONE;
|
|
AVBufferRef *data = NULL;
|
|
uint8_t mimetype[64], *desc = NULL;
|
|
AVIOContext *pb = NULL;
|
|
AVStream *st;
|
|
int width, height, ret = 0;
|
|
int len;
|
|
unsigned int type;
|
|
|
|
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)) {
|
|
av_log(s, AV_LOG_ERROR, "Invalid picture type: %d.\n", type);
|
|
if (s->error_recognition & AV_EF_EXPLODE) {
|
|
RETURN_ERROR(AVERROR_INVALIDDATA);
|
|
}
|
|
type = 0;
|
|
}
|
|
|
|
/* picture mimetype */
|
|
len = avio_rb32(pb);
|
|
if (len <= 0 || len >= 64 ||
|
|
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");
|
|
if (s->error_recognition & AV_EF_EXPLODE)
|
|
ret = AVERROR_INVALIDDATA;
|
|
goto fail;
|
|
}
|
|
av_assert0(len < sizeof(mimetype));
|
|
mimetype[len] = 0;
|
|
|
|
while (mime->id != AV_CODEC_ID_NONE) {
|
|
if (!strncmp(mime->str, mimetype, sizeof(mimetype))) {
|
|
id = mime->id;
|
|
break;
|
|
}
|
|
mime++;
|
|
}
|
|
if (id == AV_CODEC_ID_NONE) {
|
|
av_log(s, AV_LOG_ERROR, "Unknown attached picture mimetype: %s.\n",
|
|
mimetype);
|
|
if (s->error_recognition & AV_EF_EXPLODE)
|
|
ret = AVERROR_INVALIDDATA;
|
|
goto fail;
|
|
}
|
|
|
|
/* picture description */
|
|
len = avio_rb32(pb);
|
|
if (len > 0) {
|
|
if (!(desc = av_malloc(len + 1))) {
|
|
RETURN_ERROR(AVERROR(ENOMEM));
|
|
}
|
|
|
|
if (avio_read(pb, desc, len) != len) {
|
|
av_log(s, AV_LOG_ERROR, "Error reading attached picture description.\n");
|
|
if (s->error_recognition & AV_EF_EXPLODE)
|
|
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) {
|
|
av_log(s, AV_LOG_ERROR, "Invalid attached picture size: %d.\n", len);
|
|
if (s->error_recognition & AV_EF_EXPLODE)
|
|
ret = AVERROR_INVALIDDATA;
|
|
goto fail;
|
|
}
|
|
if (!(data = av_buffer_alloc(len + AV_INPUT_BUFFER_PADDING_SIZE))) {
|
|
RETURN_ERROR(AVERROR(ENOMEM));
|
|
}
|
|
memset(data->data + len, 0, AV_INPUT_BUFFER_PADDING_SIZE);
|
|
if (avio_read(pb, data->data, len) != len) {
|
|
av_log(s, AV_LOG_ERROR, "Error reading attached picture data.\n");
|
|
if (s->error_recognition & AV_EF_EXPLODE)
|
|
ret = AVERROR(EIO);
|
|
goto fail;
|
|
}
|
|
|
|
if (AV_RB64(data->data) == PNGSIG)
|
|
id = AV_CODEC_ID_PNG;
|
|
|
|
st = avformat_new_stream(s, NULL);
|
|
if (!st) {
|
|
RETURN_ERROR(AVERROR(ENOMEM));
|
|
}
|
|
|
|
av_init_packet(&st->attached_pic);
|
|
st->attached_pic.buf = data;
|
|
st->attached_pic.data = data->data;
|
|
st->attached_pic.size = len;
|
|
st->attached_pic.stream_index = st->index;
|
|
st->attached_pic.flags |= AV_PKT_FLAG_KEY;
|
|
|
|
st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
|
|
st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
|
|
st->codecpar->codec_id = id;
|
|
st->codecpar->width = width;
|
|
st->codecpar->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);
|
|
|
|
avio_context_free(&pb);
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
av_buffer_unref(&data);
|
|
av_freep(&desc);
|
|
avio_context_free(&pb);
|
|
|
|
return ret;
|
|
}
|