rawdec: add sample_rate/channels private options.
[ffmpeg.git] / libavformat / rawdec.c
1 /*
2  * RAW demuxers
3  * Copyright (c) 2001 Fabrice Bellard
4  * Copyright (c) 2005 Alex Beregszaszi
5  *
6  * This file is part of Libav.
7  *
8  * Libav is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * Libav is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with Libav; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22
23 #include "avformat.h"
24 #include "avio_internal.h"
25 #include "rawdec.h"
26 #include "libavutil/opt.h"
27
28 /* raw input */
29 int ff_raw_read_header(AVFormatContext *s, AVFormatParameters *ap)
30 {
31     AVStream *st;
32     enum CodecID id;
33
34     st = av_new_stream(s, 0);
35     if (!st)
36         return AVERROR(ENOMEM);
37
38         id = s->iformat->value;
39         if (id == CODEC_ID_RAWVIDEO) {
40             st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
41         } else {
42             st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
43         }
44         st->codec->codec_id = id;
45
46         switch(st->codec->codec_type) {
47         case AVMEDIA_TYPE_AUDIO: {
48             RawAudioDemuxerContext *s1 = s->priv_data;
49
50             if (ap->sample_rate)
51                 st->codec->sample_rate = ap->sample_rate;
52             if (ap->channels)
53                 st->codec->channels    = ap->channels;
54             else st->codec->channels   = 1;
55
56             if (s1->sample_rate)
57                 st->codec->sample_rate = s1->sample_rate;
58             if (s1->channels)
59                 st->codec->channels    = s1->channels;
60
61             st->codec->bits_per_coded_sample = av_get_bits_per_sample(st->codec->codec_id);
62             assert(st->codec->bits_per_coded_sample > 0);
63             st->codec->block_align = st->codec->bits_per_coded_sample*st->codec->channels/8;
64             av_set_pts_info(st, 64, 1, st->codec->sample_rate);
65             break;
66             }
67         case AVMEDIA_TYPE_VIDEO:
68             if(ap->time_base.num)
69                 av_set_pts_info(st, 64, ap->time_base.num, ap->time_base.den);
70             else
71                 av_set_pts_info(st, 64, 1, 25);
72             st->codec->width = ap->width;
73             st->codec->height = ap->height;
74             st->codec->pix_fmt = ap->pix_fmt;
75             if(st->codec->pix_fmt == PIX_FMT_NONE)
76                 st->codec->pix_fmt= PIX_FMT_YUV420P;
77             break;
78         default:
79             return -1;
80         }
81     return 0;
82 }
83
84 #define RAW_PACKET_SIZE 1024
85
86 int ff_raw_read_partial_packet(AVFormatContext *s, AVPacket *pkt)
87 {
88     int ret, size;
89
90     size = RAW_PACKET_SIZE;
91
92     if (av_new_packet(pkt, size) < 0)
93         return AVERROR(ENOMEM);
94
95     pkt->pos= avio_tell(s->pb);
96     pkt->stream_index = 0;
97     ret = ffio_read_partial(s->pb, pkt->data, size);
98     if (ret < 0) {
99         av_free_packet(pkt);
100         return ret;
101     }
102     pkt->size = ret;
103     return ret;
104 }
105
106 int ff_raw_audio_read_header(AVFormatContext *s,
107                              AVFormatParameters *ap)
108 {
109     AVStream *st = av_new_stream(s, 0);
110     if (!st)
111         return AVERROR(ENOMEM);
112     st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
113     st->codec->codec_id = s->iformat->value;
114     st->need_parsing = AVSTREAM_PARSE_FULL;
115     /* the parameters will be extracted from the compressed bitstream */
116
117     return 0;
118 }
119
120 /* MPEG-1/H.263 input */
121 int ff_raw_video_read_header(AVFormatContext *s,
122                              AVFormatParameters *ap)
123 {
124     AVStream *st;
125
126     st = av_new_stream(s, 0);
127     if (!st)
128         return AVERROR(ENOMEM);
129
130     st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
131     st->codec->codec_id = s->iformat->value;
132     st->need_parsing = AVSTREAM_PARSE_FULL;
133
134     /* for MJPEG, specify frame rate */
135     /* for MPEG-4 specify it, too (most MPEG-4 streams do not have the fixed_vop_rate set ...)*/
136     if (ap->time_base.num) {
137         st->codec->time_base= ap->time_base;
138     } else if ( st->codec->codec_id == CODEC_ID_MJPEG ||
139                 st->codec->codec_id == CODEC_ID_MPEG4 ||
140                 st->codec->codec_id == CODEC_ID_DIRAC ||
141                 st->codec->codec_id == CODEC_ID_DNXHD ||
142                 st->codec->codec_id == CODEC_ID_VC1   ||
143                 st->codec->codec_id == CODEC_ID_H264) {
144         st->codec->time_base= (AVRational){1,25};
145     }
146     av_set_pts_info(st, 64, 1, 1200000);
147
148     return 0;
149 }
150
151 /* Note: Do not forget to add new entries to the Makefile as well. */
152
153 static const AVOption audio_options[] = {
154     { "sample_rate", "", offsetof(RawAudioDemuxerContext, sample_rate), FF_OPT_TYPE_INT, {.dbl = 0}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
155     { "channels",    "", offsetof(RawAudioDemuxerContext, channels),    FF_OPT_TYPE_INT, {.dbl = 0}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
156     { NULL },
157 };
158
159 const AVClass ff_rawaudio_demuxer_class = {
160     .class_name     = "rawaudio demuxer",
161     .item_name      = av_default_item_name,
162     .option         = audio_options,
163     .version        = LIBAVUTIL_VERSION_INT,
164 };
165
166 #if CONFIG_G722_DEMUXER
167 AVInputFormat ff_g722_demuxer = {
168     "g722",
169     NULL_IF_CONFIG_SMALL("raw G.722"),
170     sizeof(RawAudioDemuxerContext),
171     NULL,
172     ff_raw_read_header,
173     ff_raw_read_partial_packet,
174     .flags= AVFMT_GENERIC_INDEX,
175     .extensions = "g722,722",
176     .value = CODEC_ID_ADPCM_G722,
177     .priv_class = &ff_rawaudio_demuxer_class,
178 };
179 #endif
180
181 #if CONFIG_GSM_DEMUXER
182 AVInputFormat ff_gsm_demuxer = {
183     "gsm",
184     NULL_IF_CONFIG_SMALL("raw GSM"),
185     0,
186     NULL,
187     ff_raw_audio_read_header,
188     ff_raw_read_partial_packet,
189     .flags= AVFMT_GENERIC_INDEX,
190     .extensions = "gsm",
191     .value = CODEC_ID_GSM,
192 };
193 #endif
194
195 #if CONFIG_MJPEG_DEMUXER
196 AVInputFormat ff_mjpeg_demuxer = {
197     "mjpeg",
198     NULL_IF_CONFIG_SMALL("raw MJPEG video"),
199     0,
200     NULL,
201     ff_raw_video_read_header,
202     ff_raw_read_partial_packet,
203     .flags= AVFMT_GENERIC_INDEX,
204     .extensions = "mjpg,mjpeg",
205     .value = CODEC_ID_MJPEG,
206 };
207 #endif
208
209 #if CONFIG_MLP_DEMUXER
210 AVInputFormat ff_mlp_demuxer = {
211     "mlp",
212     NULL_IF_CONFIG_SMALL("raw MLP"),
213     0,
214     NULL,
215     ff_raw_audio_read_header,
216     ff_raw_read_partial_packet,
217     .flags= AVFMT_GENERIC_INDEX,
218     .extensions = "mlp",
219     .value = CODEC_ID_MLP,
220 };
221 #endif
222
223 #if CONFIG_TRUEHD_DEMUXER
224 AVInputFormat ff_truehd_demuxer = {
225     "truehd",
226     NULL_IF_CONFIG_SMALL("raw TrueHD"),
227     0,
228     NULL,
229     ff_raw_audio_read_header,
230     ff_raw_read_partial_packet,
231     .flags= AVFMT_GENERIC_INDEX,
232     .extensions = "thd",
233     .value = CODEC_ID_TRUEHD,
234 };
235 #endif
236
237 #if CONFIG_SHORTEN_DEMUXER
238 AVInputFormat ff_shorten_demuxer = {
239     "shn",
240     NULL_IF_CONFIG_SMALL("raw Shorten"),
241     0,
242     NULL,
243     ff_raw_audio_read_header,
244     ff_raw_read_partial_packet,
245     .flags= AVFMT_GENERIC_INDEX,
246     .extensions = "shn",
247     .value = CODEC_ID_SHORTEN,
248 };
249 #endif
250
251 #if CONFIG_VC1_DEMUXER
252 AVInputFormat ff_vc1_demuxer = {
253     "vc1",
254     NULL_IF_CONFIG_SMALL("raw VC-1"),
255     0,
256     NULL /* vc1_probe */,
257     ff_raw_video_read_header,
258     ff_raw_read_partial_packet,
259     .extensions = "vc1",
260     .value = CODEC_ID_VC1,
261 };
262 #endif