wav: remove a use of deprecated AV_METADATA_ macro
[libav.git] / libavformat / yop.c
CommitLineData
6168781f 1/*
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2 * Psygnosis YOP demuxer
3 *
4 * Copyright (C) 2010 Mohamed Naufal Basheer <naufal11@gmail.com>
5 * derived from the code by
6 * Copyright (C) 2009 Thomas P. Higdon <thomas.p.higdon@gmail.com>
7 *
2912e87a 8 * This file is part of Libav.
148bcae9 9 *
2912e87a 10 * Libav is free software; you can redistribute it and/or
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11 * modify it under the terms of the GNU Lesser General Public
12 * License as published by the Free Software Foundation; either
13 * version 2.1 of the License, or (at your option) any later version.
14 *
2912e87a 15 * Libav is distributed in the hope that it will be useful,
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16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * Lesser General Public License for more details.
19 *
20 * You should have received a copy of the GNU Lesser General Public
2912e87a 21 * License along with Libav; if not, write to the Free Software
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22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 */
24
25#include "libavutil/intreadwrite.h"
26#include "avformat.h"
27
28typedef struct yop_dec_context {
29 AVPacket video_packet;
30
31 int odd_frame;
32 int frame_size;
33 int audio_block_length;
34 int palette_size;
35} YopDecContext;
36
37static int yop_probe(AVProbeData *probe_packet)
38{
39 if (AV_RB16(probe_packet->buf) == AV_RB16("YO") &&
40 probe_packet->buf[6] &&
41 probe_packet->buf[7] &&
42 !(probe_packet->buf[8] & 1) &&
43 !(probe_packet->buf[10] & 1))
44 return AVPROBE_SCORE_MAX * 3 / 4;
45
46 return 0;
47}
48
49static int yop_read_header(AVFormatContext *s, AVFormatParameters *ap)
50{
51 YopDecContext *yop = s->priv_data;
ae628ec1 52 AVIOContext *pb = s->pb;
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53
54 AVCodecContext *audio_dec, *video_dec;
55 AVStream *audio_stream, *video_stream;
56
57 int frame_rate, ret;
58
59 audio_stream = av_new_stream(s, 0);
60 video_stream = av_new_stream(s, 1);
61
62 // Extra data that will be passed to the decoder
63 video_stream->codec->extradata_size = 8;
64
65 video_stream->codec->extradata = av_mallocz(video_stream->codec->extradata_size +
66 FF_INPUT_BUFFER_PADDING_SIZE);
67
68 if (!video_stream->codec->extradata)
69 return AVERROR(ENOMEM);
70
71 // Audio
72 audio_dec = audio_stream->codec;
72415b2a 73 audio_dec->codec_type = AVMEDIA_TYPE_AUDIO;
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74 audio_dec->codec_id = CODEC_ID_ADPCM_IMA_WS;
75 audio_dec->channels = 1;
76 audio_dec->sample_rate = 22050;
77
78 // Video
79 video_dec = video_stream->codec;
72415b2a 80 video_dec->codec_type = AVMEDIA_TYPE_VIDEO;
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81 video_dec->codec_id = CODEC_ID_YOP;
82
45a8a02a 83 avio_skip(pb, 6);
148bcae9 84
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85 frame_rate = avio_r8(pb);
86 yop->frame_size = avio_r8(pb) * 2048;
87 video_dec->width = avio_rl16(pb);
88 video_dec->height = avio_rl16(pb);
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89
90 video_stream->sample_aspect_ratio = (AVRational){1, 2};
91
b7effd4e 92 ret = avio_read(pb, video_dec->extradata, 8);
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93 if (ret < 8)
94 return ret < 0 ? ret : AVERROR_EOF;
95
96 yop->palette_size = video_dec->extradata[0] * 3 + 4;
97 yop->audio_block_length = AV_RL16(video_dec->extradata + 6);
98
99 // 1840 samples per frame, 1 nibble per sample; hence 1840/2 = 920
100 if (yop->audio_block_length < 920 ||
101 yop->audio_block_length + yop->palette_size >= yop->frame_size) {
102 av_log(s, AV_LOG_ERROR, "YOP has invalid header\n");
103 return AVERROR_INVALIDDATA;
104 }
105
6b4aa5da 106 avio_seek(pb, 2048, SEEK_SET);
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107
108 av_set_pts_info(video_stream, 32, 1, frame_rate);
109
110 return 0;
111}
112
113static int yop_read_packet(AVFormatContext *s, AVPacket *pkt)
114{
115 YopDecContext *yop = s->priv_data;
ae628ec1 116 AVIOContext *pb = s->pb;
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117
118 int ret;
119 int actual_video_data_size = yop->frame_size -
120 yop->audio_block_length - yop->palette_size;
121
122 yop->video_packet.stream_index = 1;
123
124 if (yop->video_packet.data) {
125 *pkt = yop->video_packet;
126 yop->video_packet.data = NULL;
127 yop->video_packet.size = 0;
128 pkt->data[0] = yop->odd_frame;
cc947f04 129 pkt->flags |= AV_PKT_FLAG_KEY;
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130 yop->odd_frame ^= 1;
131 return pkt->size;
132 }
133 ret = av_new_packet(&yop->video_packet,
134 yop->frame_size - yop->audio_block_length);
135 if (ret < 0)
136 return ret;
137
a2704c97 138 yop->video_packet.pos = avio_tell(pb);
148bcae9 139
b7effd4e 140 ret = avio_read(pb, yop->video_packet.data, yop->palette_size);
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141 if (ret < 0) {
142 goto err_out;
143 }else if (ret < yop->palette_size) {
144 ret = AVERROR_EOF;
145 goto err_out;
146 }
147
148 ret = av_get_packet(pb, pkt, 920);
149 if (ret < 0)
150 goto err_out;
151
152 // Set position to the start of the frame
153 pkt->pos = yop->video_packet.pos;
154
45a8a02a 155 avio_skip(pb, yop->audio_block_length - ret);
148bcae9 156
b7effd4e 157 ret = avio_read(pb, yop->video_packet.data + yop->palette_size,
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158 actual_video_data_size);
159 if (ret < 0)
160 goto err_out;
161 else if (ret < actual_video_data_size)
162 av_shrink_packet(&yop->video_packet, yop->palette_size + ret);
163
164 // Arbitrarily return the audio data first
165 return yop->audio_block_length;
166
167err_out:
168 av_free_packet(&yop->video_packet);
169 return ret;
170}
171
172static int yop_read_close(AVFormatContext *s)
173{
174 YopDecContext *yop = s->priv_data;
175 av_free_packet(&yop->video_packet);
176 return 0;
177}
178
179static int yop_read_seek(AVFormatContext *s, int stream_index,
180 int64_t timestamp, int flags)
181{
182 YopDecContext *yop = s->priv_data;
183 int64_t frame_pos, pos_min, pos_max;
184 int frame_count;
185
186 av_free_packet(&yop->video_packet);
187
188 if (!stream_index)
189 return -1;
190
191 pos_min = s->data_offset;
76aa876e 192 pos_max = avio_size(s->pb) - yop->frame_size;
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193 frame_count = (pos_max - pos_min) / yop->frame_size;
194
195 timestamp = FFMAX(0, FFMIN(frame_count, timestamp));
196
197 frame_pos = timestamp * yop->frame_size + pos_min;
198 yop->odd_frame = timestamp & 1;
199
6b4aa5da 200 avio_seek(s->pb, frame_pos, SEEK_SET);
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201 return 0;
202}
203
c6610a21 204AVInputFormat ff_yop_demuxer = {
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205 "yop",
206 NULL_IF_CONFIG_SMALL("Psygnosis YOP Format"),
207 sizeof(YopDecContext),
208 yop_probe,
209 yop_read_header,
210 yop_read_packet,
211 yop_read_close,
212 yop_read_seek,
213 .extensions = "yop",
214 .flags = AVFMT_GENERIC_INDEX,
215};