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 = AV_CODEC_ID_NONE;
52 int64_t fsize = avio_size(pb);
54 AVStream *vst = avformat_new_stream(s, NULL);
56 return AVERROR(ENOMEM);
57 vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
59 switch (avio_rl32(pb)) {
61 vst->codec->codec_id = AV_CODEC_ID_MPEG4;
64 vst->codec->codec_id = AV_CODEC_ID_H264;
67 av_log(s, AV_LOG_ERROR, "Unsupported video format\n");
70 index_cnt = avio_rl32(pb);
71 vst->codec->width = avio_rl32(pb);
72 vst->codec->height = avio_rl32(pb);
74 tb_num = avio_rl32(pb);
75 tb_den = avio_rl32(pb);
76 avpriv_set_pts_info(vst, 32, tb_num, tb_den);
77 vst->nb_frames = index_cnt;
78 vst->duration = index_cnt;
80 switch (avio_rl32(pb)) {
82 audio_codec_id = AV_CODEC_ID_MP3;
85 av_log(s, AV_LOG_ERROR, "AAC not yet correctly supported\n");
86 audio_codec_id = AV_CODEC_ID_AAC;
89 av_log(s, AV_LOG_ERROR, "Unsupported audio format\n");
92 pmp->num_streams = avio_rl16(pb) + 1;
94 srate = avio_rl32(pb);
95 channels = avio_rl32(pb) + 1;
96 pos = avio_tell(pb) + 4LL*index_cnt;
97 for (i = 0; i < index_cnt; i++) {
98 uint32_t size = avio_rl32(pb);
99 int flags = size & 1 ? AVINDEX_KEYFRAME : 0;
101 av_log(s, AV_LOG_FATAL, "Encountered EOF while reading index.\n");
102 return AVERROR_INVALIDDATA;
105 if (size < 9 + 4*pmp->num_streams) {
106 av_log(s, AV_LOG_ERROR, "Packet too small\n");
107 return AVERROR_INVALIDDATA;
109 av_add_index_entry(vst, pos, i, size, 0, flags);
111 if (fsize > 0 && i == 0 && pos > fsize) {
112 av_log(s, AV_LOG_ERROR, "File ends before first packet\n");
113 return AVERROR_INVALIDDATA;
116 for (i = 1; i < pmp->num_streams; i++) {
117 AVStream *ast = avformat_new_stream(s, NULL);
119 return AVERROR(ENOMEM);
120 ast->codec->codec_type = AVMEDIA_TYPE_AUDIO;
121 ast->codec->codec_id = audio_codec_id;
122 ast->codec->channels = channels;
123 ast->codec->sample_rate = srate;
124 avpriv_set_pts_info(ast, 32, 1, srate);
129 static int pmp_packet(AVFormatContext *s, AVPacket *pkt)
131 PMPContext *pmp = s->priv_data;
132 AVIOContext *pb = s->pb;
138 if (pmp->cur_stream == 0) {
140 pmp->audio_packets = avio_r8(pb);
141 if (!pmp->audio_packets) {
142 avpriv_request_sample(s, "0 audio packets");
143 return AVERROR_PATCHWELCOME;
145 num_packets = (pmp->num_streams - 1) * pmp->audio_packets + 1;
147 pmp->current_packet = 0;
148 av_fast_malloc(&pmp->packet_sizes,
149 &pmp->packet_sizes_alloc,
150 num_packets * sizeof(*pmp->packet_sizes));
151 if (!pmp->packet_sizes_alloc) {
152 av_log(s, AV_LOG_ERROR, "Cannot (re)allocate packet buffer\n");
153 return AVERROR(ENOMEM);
155 for (i = 0; i < num_packets; i++)
156 pmp->packet_sizes[i] = avio_rl32(pb);
158 ret = av_get_packet(pb, pkt, pmp->packet_sizes[pmp->current_packet]);
161 // FIXME: this is a hack that should be removed once
162 // compute_pkt_fields() can handle timestamps properly
163 if (pmp->cur_stream == 0)
164 pkt->dts = s->streams[0]->cur_dts++;
165 pkt->stream_index = pmp->cur_stream;
167 if (pmp->current_packet % pmp->audio_packets == 0)
168 pmp->cur_stream = (pmp->cur_stream + 1) % pmp->num_streams;
169 pmp->current_packet++;
173 static int pmp_seek(AVFormatContext *s, int stream_index, int64_t ts, int flags)
175 PMPContext *pmp = s->priv_data;
177 // fallback to default seek now
181 static int pmp_close(AVFormatContext *s)
183 PMPContext *pmp = s->priv_data;
184 av_freep(&pmp->packet_sizes);
188 AVInputFormat ff_pmp_demuxer = {
190 .long_name = NULL_IF_CONFIG_SMALL("Playstation Portable PMP"),
191 .priv_data_size = sizeof(PMPContext),
192 .read_probe = pmp_probe,
193 .read_header = pmp_header,
194 .read_packet = pmp_packet,
195 .read_seek = pmp_seek,
196 .read_close = pmp_close,