3 * Copyright (c) 2011 Reimar Döffinger
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/intreadwrite.h"
30 uint32_t *packet_sizes;
31 int packet_sizes_alloc;
34 static int pmp_probe(AVProbeData *p) {
35 if (AV_RN32(p->buf) == AV_RN32("pmpm") &&
36 AV_RL32(p->buf + 4) == 1)
37 return AVPROBE_SCORE_MAX;
41 static int pmp_header(AVFormatContext *s, AVFormatParameters *ap) {
42 PMPContext *pmp = s->priv_data;
43 AVIOContext *pb = s->pb;
46 int audio_codec_id = CODEC_ID_NONE;
50 AVStream *vst = av_new_stream(s, 0);
52 return AVERROR(ENOMEM);
53 vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
55 switch (avio_rl32(pb)) {
57 vst->codec->codec_id = CODEC_ID_MPEG4;
60 vst->codec->codec_id = CODEC_ID_H264;
63 av_log(s, AV_LOG_ERROR, "Unsupported video format\n");
66 index_cnt = avio_rl32(pb);
67 vst->codec->width = avio_rl32(pb);
68 vst->codec->height = avio_rl32(pb);
70 tb_num = avio_rl32(pb);
71 tb_den = avio_rl32(pb);
72 av_set_pts_info(vst, 32, tb_num, tb_den);
73 vst->nb_frames = index_cnt;
74 vst->duration = index_cnt;
76 switch (avio_rl32(pb)) {
78 audio_codec_id = CODEC_ID_MP3;
81 av_log(s, AV_LOG_ERROR, "AAC not yet correctly supported\n");
82 audio_codec_id = CODEC_ID_AAC;
85 av_log(s, AV_LOG_ERROR, "Unsupported audio format\n");
88 pmp->num_streams = avio_rl16(pb) + 1;
90 srate = avio_rl32(pb);
91 channels = avio_rl32(pb) + 1;
92 for (i = 1; i < pmp->num_streams; i++) {
93 AVStream *ast = av_new_stream(s, i);
95 return AVERROR(ENOMEM);
96 ast->codec->codec_type = AVMEDIA_TYPE_AUDIO;
97 ast->codec->codec_id = audio_codec_id;
98 ast->codec->channels = channels;
99 ast->codec->sample_rate = srate;
100 av_set_pts_info(ast, 32, 1, srate);
102 pos = avio_tell(pb) + 4*index_cnt;
103 for (i = 0; i < index_cnt; i++) {
104 int size = avio_rl32(pb);
105 int flags = size & 1 ? AVINDEX_KEYFRAME : 0;
107 av_add_index_entry(vst, pos, i, size, 0, flags);
113 static int pmp_packet(AVFormatContext *s, AVPacket *pkt) {
114 PMPContext *pmp = s->priv_data;
115 AVIOContext *pb = s->pb;
121 if (pmp->cur_stream == 0) {
123 pmp->audio_packets = avio_r8(pb);
124 num_packets = (pmp->num_streams - 1) * pmp->audio_packets + 1;
126 pmp->current_packet = 0;
127 av_fast_malloc(&pmp->packet_sizes,
128 &pmp->packet_sizes_alloc,
129 num_packets * sizeof(*pmp->packet_sizes));
130 for (i = 0; i < num_packets; i++)
131 pmp->packet_sizes[i] = avio_rl32(pb);
133 ret = av_get_packet(pb, pkt, pmp->packet_sizes[pmp->current_packet]);
136 // FIXME: this is a hack that should be remove once
137 // compute_pkt_fields can handle
138 if (pmp->cur_stream == 0)
139 pkt->dts = s->streams[0]->cur_dts++;
140 pkt->stream_index = pmp->cur_stream;
142 if (pmp->current_packet % pmp->audio_packets == 0)
143 pmp->cur_stream = (pmp->cur_stream + 1) % pmp->num_streams;
144 pmp->current_packet++;
148 static int pmp_seek(AVFormatContext *s, int stream_index,
149 int64_t ts, int flags) {
150 PMPContext *pmp = s->priv_data;
152 // fallback to default seek now
156 static int pmp_close(AVFormatContext *s)
158 PMPContext *pmp = s->priv_data;
159 av_freep(&pmp->packet_sizes);
163 AVInputFormat ff_pmp_demuxer = {
165 .long_name = NULL_IF_CONFIG_SMALL("Playstation Portable PMP format"),
166 .priv_data_size = sizeof(PMPContext),
167 .read_probe = pmp_probe,
168 .read_header = pmp_header,
169 .read_packet = pmp_packet,
170 .read_seek = pmp_seek,
171 .read_close = pmp_close,