3 * Copyright (c) 2011 Reimar Döffinger
5 * This file is part of Libav.
7 * Libav 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 * Libav 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 Libav; 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"
26 typedef struct PMPContext {
31 uint32_t *packet_sizes;
32 int packet_sizes_alloc;
35 static int pmp_probe(AVProbeData *p)
37 if (!memcmp(p->buf, "pmpm\1\0\0\0", 8))
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 = AV_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 = AV_CODEC_ID_MPEG4;
62 vst->codec->codec_id = AV_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 = AV_CODEC_ID_MP3;
83 av_log(s, AV_LOG_WARNING, "AAC is not yet correctly supported\n");
84 audio_codec_id = AV_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(s, AV_LOG_ERROR, "No audio packets.\n");
129 return AVERROR_INVALIDDATA;
132 num_packets = (pmp->num_streams - 1) * pmp->audio_packets + 1;
134 pmp->current_packet = 0;
135 av_fast_malloc(&pmp->packet_sizes,
136 &pmp->packet_sizes_alloc,
137 num_packets * sizeof(*pmp->packet_sizes));
138 if (!pmp->packet_sizes_alloc) {
139 av_log(s, AV_LOG_ERROR, "Cannot (re)allocate packet buffer\n");
140 return AVERROR(ENOMEM);
142 for (i = 0; i < num_packets; i++)
143 pmp->packet_sizes[i] = avio_rl32(pb);
145 ret = av_get_packet(pb, pkt, pmp->packet_sizes[pmp->current_packet]);
148 // FIXME: this is a hack that should be removed once
149 // compute_pkt_fields() can handle timestamps properly
150 if (pmp->cur_stream == 0)
151 pkt->dts = s->streams[0]->cur_dts++;
152 pkt->stream_index = pmp->cur_stream;
154 pmp->current_packet++;
155 if (pmp->current_packet == 1 || pmp->current_packet > pmp->audio_packets)
156 pmp->cur_stream = (pmp->cur_stream + 1) % pmp->num_streams;
161 static int pmp_seek(AVFormatContext *s, int stream_idx, int64_t ts, int flags)
163 PMPContext *pmp = s->priv_data;
165 // fall back on default seek now
169 static int pmp_close(AVFormatContext *s)
171 PMPContext *pmp = s->priv_data;
172 av_freep(&pmp->packet_sizes);
176 AVInputFormat ff_pmp_demuxer = {
178 .long_name = NULL_IF_CONFIG_SMALL("Playstation Portable PMP"),
179 .priv_data_size = sizeof(PMPContext),
180 .read_probe = pmp_probe,
181 .read_header = pmp_header,
182 .read_packet = pmp_packet,
183 .read_seek = pmp_seek,
184 .read_close = pmp_close,