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"
31 uint32_t *packet_sizes;
32 int packet_sizes_alloc;
35 static int pmp_probe(AVProbeData *p) {
36 if (AV_RN32(p->buf) == AV_RN32("pmpm") &&
37 AV_RL32(p->buf + 4) == 1)
38 return AVPROBE_SCORE_MAX;
42 static int pmp_header(AVFormatContext *s)
44 PMPContext *pmp = s->priv_data;
45 AVIOContext *pb = s->pb;
48 int audio_codec_id = CODEC_ID_NONE;
52 AVStream *vst = avformat_new_stream(s, NULL);
54 return AVERROR(ENOMEM);
55 vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
57 switch (avio_rl32(pb)) {
59 vst->codec->codec_id = CODEC_ID_MPEG4;
62 vst->codec->codec_id = CODEC_ID_H264;
65 av_log(s, AV_LOG_ERROR, "Unsupported video format\n");
68 index_cnt = avio_rl32(pb);
69 vst->codec->width = avio_rl32(pb);
70 vst->codec->height = avio_rl32(pb);
72 tb_num = avio_rl32(pb);
73 tb_den = avio_rl32(pb);
74 avpriv_set_pts_info(vst, 32, tb_num, tb_den);
75 vst->nb_frames = index_cnt;
76 vst->duration = index_cnt;
78 switch (avio_rl32(pb)) {
80 audio_codec_id = CODEC_ID_MP3;
83 av_log(s, AV_LOG_ERROR, "AAC not yet correctly supported\n");
84 audio_codec_id = CODEC_ID_AAC;
87 av_log(s, AV_LOG_ERROR, "Unsupported audio format\n");
90 pmp->num_streams = avio_rl16(pb) + 1;
92 srate = avio_rl32(pb);
93 channels = avio_rl32(pb) + 1;
94 for (i = 1; i < pmp->num_streams; i++) {
95 AVStream *ast = avformat_new_stream(s, NULL);
97 return AVERROR(ENOMEM);
98 ast->codec->codec_type = AVMEDIA_TYPE_AUDIO;
99 ast->codec->codec_id = audio_codec_id;
100 ast->codec->channels = channels;
101 ast->codec->sample_rate = srate;
102 avpriv_set_pts_info(ast, 32, 1, srate);
104 pos = avio_tell(pb) + 4*index_cnt;
105 for (i = 0; i < index_cnt; i++) {
106 int size = avio_rl32(pb);
107 int flags = size & 1 ? AVINDEX_KEYFRAME : 0;
109 av_add_index_entry(vst, pos, i, size, 0, flags);
115 static int pmp_packet(AVFormatContext *s, AVPacket *pkt)
117 PMPContext *pmp = s->priv_data;
118 AVIOContext *pb = s->pb;
124 if (pmp->cur_stream == 0) {
126 pmp->audio_packets = avio_r8(pb);
127 if (!pmp->audio_packets) {
128 av_log_ask_for_sample(s, "0 audio packets\n");
129 return AVERROR_PATCHWELCOME;
131 num_packets = (pmp->num_streams - 1) * pmp->audio_packets + 1;
133 pmp->current_packet = 0;
134 av_fast_malloc(&pmp->packet_sizes,
135 &pmp->packet_sizes_alloc,
136 num_packets * sizeof(*pmp->packet_sizes));
137 if (!pmp->packet_sizes_alloc) {
138 av_log(s, AV_LOG_ERROR, "Cannot (re)allocate packet buffer\n");
139 return AVERROR(ENOMEM);
141 for (i = 0; i < num_packets; i++)
142 pmp->packet_sizes[i] = avio_rl32(pb);
144 ret = av_get_packet(pb, pkt, pmp->packet_sizes[pmp->current_packet]);
147 // FIXME: this is a hack that should be removed once
148 // compute_pkt_fields() can handle timestamps properly
149 if (pmp->cur_stream == 0)
150 pkt->dts = s->streams[0]->cur_dts++;
151 pkt->stream_index = pmp->cur_stream;
153 if (pmp->current_packet % pmp->audio_packets == 0)
154 pmp->cur_stream = (pmp->cur_stream + 1) % pmp->num_streams;
155 pmp->current_packet++;
159 static int pmp_seek(AVFormatContext *s, int stream_index, int64_t ts, int flags)
161 PMPContext *pmp = s->priv_data;
163 // fallback to default seek now
167 static int pmp_close(AVFormatContext *s)
169 PMPContext *pmp = s->priv_data;
170 av_freep(&pmp->packet_sizes);
174 AVInputFormat ff_pmp_demuxer = {
176 .long_name = NULL_IF_CONFIG_SMALL("Playstation Portable PMP format"),
177 .priv_data_size = sizeof(PMPContext),
178 .read_probe = pmp_probe,
179 .read_header = pmp_header,
180 .read_packet = pmp_packet,
181 .read_seek = pmp_seek,
182 .read_close = pmp_close,