-/**
- * @file libavformat/yop.c
+/*
* Psygnosis YOP demuxer
*
* Copyright (C) 2010 Mohamed Naufal Basheer <naufal11@gmail.com>
* derived from the code by
* Copyright (C) 2009 Thomas P. Higdon <thomas.p.higdon@gmail.com>
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+#include "libavutil/channel_layout.h"
#include "libavutil/intreadwrite.h"
#include "avformat.h"
+#include "internal.h"
typedef struct yop_dec_context {
AVPacket video_packet;
return 0;
}
-static int yop_read_header(AVFormatContext *s, AVFormatParameters *ap)
+static int yop_read_header(AVFormatContext *s)
{
YopDecContext *yop = s->priv_data;
- ByteIOContext *pb = s->pb;
+ AVIOContext *pb = s->pb;
AVCodecContext *audio_dec, *video_dec;
AVStream *audio_stream, *video_stream;
int frame_rate, ret;
- audio_stream = av_new_stream(s, 0);
- video_stream = av_new_stream(s, 1);
+ audio_stream = avformat_new_stream(s, NULL);
+ video_stream = avformat_new_stream(s, NULL);
// Extra data that will be passed to the decoder
video_stream->codec->extradata_size = 8;
// Audio
audio_dec = audio_stream->codec;
audio_dec->codec_type = AVMEDIA_TYPE_AUDIO;
- audio_dec->codec_id = CODEC_ID_ADPCM_IMA_WS;
+ audio_dec->codec_id = AV_CODEC_ID_ADPCM_IMA_APC;
audio_dec->channels = 1;
+ audio_dec->channel_layout = AV_CH_LAYOUT_MONO;
audio_dec->sample_rate = 22050;
// Video
video_dec = video_stream->codec;
video_dec->codec_type = AVMEDIA_TYPE_VIDEO;
- video_dec->codec_id = CODEC_ID_YOP;
+ video_dec->codec_id = AV_CODEC_ID_YOP;
- url_fskip(pb, 6);
+ avio_skip(pb, 6);
- frame_rate = get_byte(pb);
- yop->frame_size = get_byte(pb) * 2048;
- video_dec->width = get_le16(pb);
- video_dec->height = get_le16(pb);
+ frame_rate = avio_r8(pb);
+ yop->frame_size = avio_r8(pb) * 2048;
+ video_dec->width = avio_rl16(pb);
+ video_dec->height = avio_rl16(pb);
video_stream->sample_aspect_ratio = (AVRational){1, 2};
- ret = get_buffer(pb, video_dec->extradata, 8);
+ ret = avio_read(pb, video_dec->extradata, 8);
if (ret < 8)
return ret < 0 ? ret : AVERROR_EOF;
return AVERROR_INVALIDDATA;
}
- url_fseek(pb, 2048, SEEK_SET);
+ avio_seek(pb, 2048, SEEK_SET);
- av_set_pts_info(video_stream, 32, 1, frame_rate);
+ avpriv_set_pts_info(video_stream, 32, 1, frame_rate);
return 0;
}
static int yop_read_packet(AVFormatContext *s, AVPacket *pkt)
{
YopDecContext *yop = s->priv_data;
- ByteIOContext *pb = s->pb;
+ AVIOContext *pb = s->pb;
int ret;
int actual_video_data_size = yop->frame_size -
yop->video_packet.data = NULL;
yop->video_packet.size = 0;
pkt->data[0] = yop->odd_frame;
- pkt->flags |= PKT_FLAG_KEY;
+ pkt->flags |= AV_PKT_FLAG_KEY;
yop->odd_frame ^= 1;
return pkt->size;
}
if (ret < 0)
return ret;
- yop->video_packet.pos = url_ftell(pb);
+ yop->video_packet.pos = avio_tell(pb);
- ret = get_buffer(pb, yop->video_packet.data, yop->palette_size);
+ ret = avio_read(pb, yop->video_packet.data, yop->palette_size);
if (ret < 0) {
goto err_out;
}else if (ret < yop->palette_size) {
// Set position to the start of the frame
pkt->pos = yop->video_packet.pos;
- url_fskip(pb, yop->audio_block_length - ret);
+ avio_skip(pb, yop->audio_block_length - ret);
- ret = get_buffer(pb, yop->video_packet.data + yop->palette_size,
+ ret = avio_read(pb, yop->video_packet.data + yop->palette_size,
actual_video_data_size);
if (ret < 0)
goto err_out;
int64_t frame_pos, pos_min, pos_max;
int frame_count;
- av_free_packet(&yop->video_packet);
-
if (!stream_index)
return -1;
pos_min = s->data_offset;
- pos_max = url_fsize(s->pb) - yop->frame_size;
+ pos_max = avio_size(s->pb) - yop->frame_size;
frame_count = (pos_max - pos_min) / yop->frame_size;
timestamp = FFMAX(0, FFMIN(frame_count, timestamp));
frame_pos = timestamp * yop->frame_size + pos_min;
+
+ if (avio_seek(s->pb, frame_pos, SEEK_SET) < 0)
+ return -1;
+
+ av_free_packet(&yop->video_packet);
yop->odd_frame = timestamp & 1;
- url_fseek(s->pb, frame_pos, SEEK_SET);
return 0;
}
-AVInputFormat yop_demuxer = {
- "yop",
- NULL_IF_CONFIG_SMALL("Psygnosis YOP Format"),
- sizeof(YopDecContext),
- yop_probe,
- yop_read_header,
- yop_read_packet,
- yop_read_close,
- yop_read_seek,
- .extensions = "yop",
- .flags = AVFMT_GENERIC_INDEX,
+AVInputFormat ff_yop_demuxer = {
+ .name = "yop",
+ .long_name = NULL_IF_CONFIG_SMALL("Psygnosis YOP"),
+ .priv_data_size = sizeof(YopDecContext),
+ .read_probe = yop_probe,
+ .read_header = yop_read_header,
+ .read_packet = yop_read_packet,
+ .read_close = yop_read_close,
+ .read_seek = yop_read_seek,
+ .extensions = "yop",
+ .flags = AVFMT_GENERIC_INDEX,
};
projects / ffmpeg / blobdiff