rawdec.c
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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 "internal.h"
25 #include "avio_internal.h"
26 #include "rawdec.h"
27 #include "libavutil/opt.h"
28 #include "libavutil/parseutils.h"
29 #include "libavutil/pixdesc.h"
30 
31 /* raw input */
33 {
34  AVStream *st;
35  enum CodecID id;
36 
37  st = avformat_new_stream(s, NULL);
38  if (!st)
39  return AVERROR(ENOMEM);
40 
41  id = s->iformat->value;
42  if (id == CODEC_ID_RAWVIDEO) {
44  } else {
46  }
47  st->codec->codec_id = id;
48 
49  switch(st->codec->codec_type) {
50  case AVMEDIA_TYPE_AUDIO: {
52 
53  st->codec->channels = 1;
54 
55  if (id == CODEC_ID_ADPCM_G722)
56  st->codec->sample_rate = 16000;
57 
58  if (s1 && s1->sample_rate)
59  st->codec->sample_rate = s1->sample_rate;
60  if (s1 && s1->channels)
61  st->codec->channels = s1->channels;
62 
64  assert(st->codec->bits_per_coded_sample > 0);
66  avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
67  break;
68  }
69  case AVMEDIA_TYPE_VIDEO: {
71  int width = 0, height = 0, ret = 0;
72  enum PixelFormat pix_fmt;
73  AVRational framerate;
74 
75  if (s1->video_size && (ret = av_parse_video_size(&width, &height, s1->video_size)) < 0) {
76  av_log(s, AV_LOG_ERROR, "Couldn't parse video size.\n");
77  goto fail;
78  }
79  if ((pix_fmt = av_get_pix_fmt(s1->pixel_format)) == PIX_FMT_NONE) {
80  av_log(s, AV_LOG_ERROR, "No such pixel format: %s.\n", s1->pixel_format);
81  ret = AVERROR(EINVAL);
82  goto fail;
83  }
84  if ((ret = av_parse_video_rate(&framerate, s1->framerate)) < 0) {
85  av_log(s, AV_LOG_ERROR, "Could not parse framerate: %s.\n", s1->framerate);
86  goto fail;
87  }
88  avpriv_set_pts_info(st, 64, framerate.den, framerate.num);
89  st->codec->width = width;
90  st->codec->height = height;
91  st->codec->pix_fmt = pix_fmt;
92 fail:
93  return ret;
94  }
95  default:
96  return -1;
97  }
98  return 0;
99 }
100 
101 #define RAW_PACKET_SIZE 1024
102 
104 {
105  int ret, size;
106 
107  size = RAW_PACKET_SIZE;
108 
109  if (av_new_packet(pkt, size) < 0)
110  return AVERROR(ENOMEM);
111 
112  pkt->pos= avio_tell(s->pb);
113  pkt->stream_index = 0;
114  ret = ffio_read_partial(s->pb, pkt->data, size);
115  if (ret < 0) {
116  av_free_packet(pkt);
117  return ret;
118  }
119  pkt->size = ret;
120  return ret;
121 }
122 
124  AVFormatParameters *ap)
125 {
127  if (!st)
128  return AVERROR(ENOMEM);
130  st->codec->codec_id = s->iformat->value;
132  st->start_time = 0;
133  /* the parameters will be extracted from the compressed bitstream */
134 
135  return 0;
136 }
137 
138 /* MPEG-1/H.263 input */
140  AVFormatParameters *ap)
141 {
142  AVStream *st;
144  AVRational framerate;
145  int ret = 0;
146 
147 
148  st = avformat_new_stream(s, NULL);
149  if (!st) {
150  ret = AVERROR(ENOMEM);
151  goto fail;
152  }
153 
155  st->codec->codec_id = s->iformat->value;
157 
158  if ((ret = av_parse_video_rate(&framerate, s1->framerate)) < 0) {
159  av_log(s, AV_LOG_ERROR, "Could not parse framerate: %s.\n", s1->framerate);
160  goto fail;
161  }
162 
163  st->r_frame_rate = st->avg_frame_rate = framerate;
164  avpriv_set_pts_info(st, 64, 1, 1200000);
165 
166 fail:
167  return ret;
168 }
169 
170 /* Note: Do not forget to add new entries to the Makefile as well. */
171 
172 #define OFFSET(x) offsetof(FFRawVideoDemuxerContext, x)
173 #define DEC AV_OPT_FLAG_DECODING_PARAM
175  { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = "25"}, 0, 0, DEC},
176  { NULL },
177 };
178 
179 #if CONFIG_G722_DEMUXER
180 AVInputFormat ff_g722_demuxer = {
181  .name = "g722",
182  .long_name = NULL_IF_CONFIG_SMALL("raw G.722"),
183  .read_header = ff_raw_read_header,
184  .read_packet = ff_raw_read_partial_packet,
185  .flags= AVFMT_GENERIC_INDEX,
186  .extensions = "g722,722",
187  .value = CODEC_ID_ADPCM_G722,
188 };
189 #endif
190 
191 #if CONFIG_LATM_DEMUXER
192 AVInputFormat ff_latm_demuxer = {
193  .name = "latm",
194  .long_name = NULL_IF_CONFIG_SMALL("raw LOAS/LATM"),
195  .read_header = ff_raw_audio_read_header,
196  .read_packet = ff_raw_read_partial_packet,
197  .flags= AVFMT_GENERIC_INDEX,
198  .extensions = "latm",
199  .value = CODEC_ID_AAC_LATM,
200 };
201 #endif
202 
203 #if CONFIG_MJPEG_DEMUXER
204 FF_DEF_RAWVIDEO_DEMUXER(mjpeg, "raw MJPEG video", NULL, "mjpg,mjpeg", CODEC_ID_MJPEG)
205 #endif
206 
207 #if CONFIG_MLP_DEMUXER
208 AVInputFormat ff_mlp_demuxer = {
209  .name = "mlp",
210  .long_name = NULL_IF_CONFIG_SMALL("raw MLP"),
211  .read_header = ff_raw_audio_read_header,
212  .read_packet = ff_raw_read_partial_packet,
213  .flags= AVFMT_GENERIC_INDEX,
214  .extensions = "mlp",
215  .value = CODEC_ID_MLP,
216 };
217 #endif
218 
219 #if CONFIG_TRUEHD_DEMUXER
220 AVInputFormat ff_truehd_demuxer = {
221  .name = "truehd",
222  .long_name = NULL_IF_CONFIG_SMALL("raw TrueHD"),
223  .read_header = ff_raw_audio_read_header,
224  .read_packet = ff_raw_read_partial_packet,
225  .flags= AVFMT_GENERIC_INDEX,
226  .extensions = "thd",
227  .value = CODEC_ID_TRUEHD,
228 };
229 #endif
230 
231 #if CONFIG_SHORTEN_DEMUXER
232 AVInputFormat ff_shorten_demuxer = {
233  .name = "shn",
234  .long_name = NULL_IF_CONFIG_SMALL("raw Shorten"),
235  .read_header = ff_raw_audio_read_header,
236  .read_packet = ff_raw_read_partial_packet,
238  .extensions = "shn",
239  .value = CODEC_ID_SHORTEN,
240 };
241 #endif
242 
243 #if CONFIG_VC1_DEMUXER
244 FF_DEF_RAWVIDEO_DEMUXER(vc1, "raw VC-1", NULL, "vc1", CODEC_ID_VC1)
245 #endif