0,0 → 1,153 |
/* |
* 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 "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; |
} |
|
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->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_buffer_unref(&data); |
av_freep(&desc); |
av_freep(&pb); |
|
return ret; |
} |