blob: 0e80a095fb9b0abb48f5ef83dc8b3c6d91651941
1 | /* |
2 | * PMP demuxer. |
3 | * Copyright (c) 2011 Reimar Döffinger |
4 | * |
5 | * This file is part of FFmpeg. |
6 | * |
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. |
11 | * |
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. |
16 | * |
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 |
20 | */ |
21 | |
22 | #include "libavutil/intreadwrite.h" |
23 | #include "avformat.h" |
24 | #include "internal.h" |
25 | |
26 | typedef struct { |
27 | int cur_stream; |
28 | int num_streams; |
29 | int audio_packets; |
30 | int current_packet; |
31 | uint32_t *packet_sizes; |
32 | int packet_sizes_alloc; |
33 | } PMPContext; |
34 | |
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; |
39 | return 0; |
40 | } |
41 | |
42 | static int pmp_header(AVFormatContext *s) |
43 | { |
44 | PMPContext *pmp = s->priv_data; |
45 | AVIOContext *pb = s->pb; |
46 | int tb_num, tb_den; |
47 | uint32_t index_cnt; |
48 | int audio_codec_id = AV_CODEC_ID_NONE; |
49 | int srate, channels; |
50 | unsigned i; |
51 | uint64_t pos; |
52 | int64_t fsize = avio_size(pb); |
53 | |
54 | AVStream *vst = avformat_new_stream(s, NULL); |
55 | if (!vst) |
56 | return AVERROR(ENOMEM); |
57 | vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO; |
58 | avio_skip(pb, 8); |
59 | switch (avio_rl32(pb)) { |
60 | case 0: |
61 | vst->codecpar->codec_id = AV_CODEC_ID_MPEG4; |
62 | break; |
63 | case 1: |
64 | vst->codecpar->codec_id = AV_CODEC_ID_H264; |
65 | break; |
66 | default: |
67 | av_log(s, AV_LOG_ERROR, "Unsupported video format\n"); |
68 | break; |
69 | } |
70 | index_cnt = avio_rl32(pb); |
71 | vst->codecpar->width = avio_rl32(pb); |
72 | vst->codecpar->height = avio_rl32(pb); |
73 | |
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; |
79 | |
80 | switch (avio_rl32(pb)) { |
81 | case 0: |
82 | audio_codec_id = AV_CODEC_ID_MP3; |
83 | break; |
84 | case 1: |
85 | av_log(s, AV_LOG_ERROR, "AAC not yet correctly supported\n"); |
86 | audio_codec_id = AV_CODEC_ID_AAC; |
87 | break; |
88 | default: |
89 | av_log(s, AV_LOG_ERROR, "Unsupported audio format\n"); |
90 | break; |
91 | } |
92 | pmp->num_streams = avio_rl16(pb) + 1; |
93 | avio_skip(pb, 10); |
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; |
100 | if (avio_feof(pb)) { |
101 | av_log(s, AV_LOG_FATAL, "Encountered EOF while reading index.\n"); |
102 | return AVERROR_INVALIDDATA; |
103 | } |
104 | size >>= 1; |
105 | if (size < 9 + 4*pmp->num_streams) { |
106 | av_log(s, AV_LOG_ERROR, "Packet too small\n"); |
107 | return AVERROR_INVALIDDATA; |
108 | } |
109 | av_add_index_entry(vst, pos, i, size, 0, flags); |
110 | pos += size; |
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; |
114 | } |
115 | } |
116 | for (i = 1; i < pmp->num_streams; i++) { |
117 | AVStream *ast = avformat_new_stream(s, NULL); |
118 | if (!ast) |
119 | return AVERROR(ENOMEM); |
120 | ast->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; |
121 | ast->codecpar->codec_id = audio_codec_id; |
122 | ast->codecpar->channels = channels; |
123 | ast->codecpar->sample_rate = srate; |
124 | avpriv_set_pts_info(ast, 32, 1, srate); |
125 | } |
126 | return 0; |
127 | } |
128 | |
129 | static int pmp_packet(AVFormatContext *s, AVPacket *pkt) |
130 | { |
131 | PMPContext *pmp = s->priv_data; |
132 | AVIOContext *pb = s->pb; |
133 | int ret = 0; |
134 | int i; |
135 | |
136 | if (avio_feof(pb)) |
137 | return AVERROR_EOF; |
138 | if (pmp->cur_stream == 0) { |
139 | int num_packets; |
140 | pmp->audio_packets = avio_r8(pb); |
141 | |
142 | if (!pmp->audio_packets) { |
143 | av_log(s, AV_LOG_ERROR, "No audio packets.\n"); |
144 | return AVERROR_INVALIDDATA; |
145 | } |
146 | |
147 | num_packets = (pmp->num_streams - 1) * pmp->audio_packets + 1; |
148 | avio_skip(pb, 8); |
149 | pmp->current_packet = 0; |
150 | av_fast_malloc(&pmp->packet_sizes, |
151 | &pmp->packet_sizes_alloc, |
152 | num_packets * sizeof(*pmp->packet_sizes)); |
153 | if (!pmp->packet_sizes_alloc) { |
154 | av_log(s, AV_LOG_ERROR, "Cannot (re)allocate packet buffer\n"); |
155 | return AVERROR(ENOMEM); |
156 | } |
157 | for (i = 0; i < num_packets; i++) |
158 | pmp->packet_sizes[i] = avio_rl32(pb); |
159 | } |
160 | ret = av_get_packet(pb, pkt, pmp->packet_sizes[pmp->current_packet]); |
161 | if (ret >= 0) { |
162 | ret = 0; |
163 | pkt->stream_index = pmp->cur_stream; |
164 | } |
165 | if (pmp->current_packet % pmp->audio_packets == 0) |
166 | pmp->cur_stream = (pmp->cur_stream + 1) % pmp->num_streams; |
167 | pmp->current_packet++; |
168 | return ret; |
169 | } |
170 | |
171 | static int pmp_seek(AVFormatContext *s, int stream_index, int64_t ts, int flags) |
172 | { |
173 | PMPContext *pmp = s->priv_data; |
174 | pmp->cur_stream = 0; |
175 | // fall back on default seek now |
176 | return -1; |
177 | } |
178 | |
179 | static int pmp_close(AVFormatContext *s) |
180 | { |
181 | PMPContext *pmp = s->priv_data; |
182 | av_freep(&pmp->packet_sizes); |
183 | return 0; |
184 | } |
185 | |
186 | AVInputFormat ff_pmp_demuxer = { |
187 | .name = "pmp", |
188 | .long_name = NULL_IF_CONFIG_SMALL("Playstation Portable PMP"), |
189 | .priv_data_size = sizeof(PMPContext), |
190 | .read_probe = pmp_probe, |
191 | .read_header = pmp_header, |
192 | .read_packet = pmp_packet, |
193 | .read_seek = pmp_seek, |
194 | .read_close = pmp_close, |
195 | }; |
196 |