Libav
libdc1394.c
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1 /*
2  * IIDC1394 grab interface (uses libdc1394 and libraw1394)
3  * Copyright (c) 2004 Roman Shaposhnik
4  * Copyright (c) 2008 Alessandro Sappia
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 "config.h"
24 #include "libavformat/avformat.h"
25 #include "libavformat/internal.h"
26 #include "libavutil/log.h"
27 #include "libavutil/mathematics.h"
28 #include "libavutil/opt.h"
29 #include "libavutil/parseutils.h"
30 #include "libavutil/pixdesc.h"
31 
32 #if HAVE_LIBDC1394_2
33 #include <dc1394/dc1394.h>
34 #elif HAVE_LIBDC1394_1
35 #include <libraw1394/raw1394.h>
36 #include <libdc1394/dc1394_control.h>
37 
38 #define DC1394_VIDEO_MODE_320x240_YUV422 MODE_320x240_YUV422
39 #define DC1394_VIDEO_MODE_640x480_YUV411 MODE_640x480_YUV411
40 #define DC1394_VIDEO_MODE_640x480_YUV422 MODE_640x480_YUV422
41 #define DC1394_FRAMERATE_1_875 FRAMERATE_1_875
42 #define DC1394_FRAMERATE_3_75 FRAMERATE_3_75
43 #define DC1394_FRAMERATE_7_5 FRAMERATE_7_5
44 #define DC1394_FRAMERATE_15 FRAMERATE_15
45 #define DC1394_FRAMERATE_30 FRAMERATE_30
46 #define DC1394_FRAMERATE_60 FRAMERATE_60
47 #define DC1394_FRAMERATE_120 FRAMERATE_120
48 #define DC1394_FRAMERATE_240 FRAMERATE_240
49 #endif
50 
51 typedef struct dc1394_data {
52  AVClass *class;
53 #if HAVE_LIBDC1394_1
54  raw1394handle_t handle;
55  dc1394_cameracapture camera;
56  int channel;
57 #elif HAVE_LIBDC1394_2
58  dc1394_t *d;
59  dc1394camera_t *camera;
60  dc1394video_frame_t *frame;
61 #endif
63  int frame_rate;
64  char *video_size;
65  char *pixel_format;
66  char *framerate;
69 } dc1394_data;
70 
72  int width;
73  int height;
77  { 320, 240, AV_PIX_FMT_UYVY422, DC1394_VIDEO_MODE_320x240_YUV422 },
78  { 640, 480, AV_PIX_FMT_UYYVYY411, DC1394_VIDEO_MODE_640x480_YUV411 },
79  { 640, 480, AV_PIX_FMT_UYVY422, DC1394_VIDEO_MODE_640x480_YUV422 },
80  { 0, 0, 0, 0 } /* gotta be the last one */
81 };
82 
86 } dc1394_frame_rates[] = {
87  { 1875, DC1394_FRAMERATE_1_875 },
88  { 3750, DC1394_FRAMERATE_3_75 },
89  { 7500, DC1394_FRAMERATE_7_5 },
90  { 15000, DC1394_FRAMERATE_15 },
91  { 30000, DC1394_FRAMERATE_30 },
92  { 60000, DC1394_FRAMERATE_60 },
93  {120000, DC1394_FRAMERATE_120 },
94  {240000, DC1394_FRAMERATE_240 },
95  { 0, 0 } /* gotta be the last one */
96 };
97 
98 #define OFFSET(x) offsetof(dc1394_data, x)
99 #define DEC AV_OPT_FLAG_DECODING_PARAM
100 static const AVOption options[] = {
101 #if HAVE_LIBDC1394_1
102  { "channel", "", offsetof(dc1394_data, channel), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
103 #endif
104  { "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(video_size), AV_OPT_TYPE_STRING, {.str = "qvga"}, 0, 0, DEC },
105  { "pixel_format", "", OFFSET(pixel_format), AV_OPT_TYPE_STRING, {.str = "uyvy422"}, 0, 0, DEC },
106  { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = "ntsc"}, 0, 0, DEC },
107  { NULL },
108 };
109 
110 static const AVClass libdc1394_class = {
111  .class_name = "libdc1394 indev",
112  .item_name = av_default_item_name,
113  .option = options,
114  .version = LIBAVUTIL_VERSION_INT,
115 };
116 
117 
118 static inline int dc1394_read_common(AVFormatContext *c,
119  struct dc1394_frame_format **select_fmt, struct dc1394_frame_rate **select_fps)
120 {
121  dc1394_data* dc1394 = c->priv_data;
122  AVStream* vst;
123  struct dc1394_frame_format *fmt;
124  struct dc1394_frame_rate *fps;
125  enum AVPixelFormat pix_fmt;
126  int width, height;
127  AVRational framerate;
128  int ret = 0;
129 
130  if ((pix_fmt = av_get_pix_fmt(dc1394->pixel_format)) == AV_PIX_FMT_NONE) {
131  av_log(c, AV_LOG_ERROR, "No such pixel format: %s.\n", dc1394->pixel_format);
132  ret = AVERROR(EINVAL);
133  goto out;
134  }
135 
136  if ((ret = av_parse_video_size(&width, &height, dc1394->video_size)) < 0) {
137  av_log(c, AV_LOG_ERROR, "Could not parse video size '%s'.\n", dc1394->video_size);
138  goto out;
139  }
140  if ((ret = av_parse_video_rate(&framerate, dc1394->framerate)) < 0) {
141  av_log(c, AV_LOG_ERROR, "Could not parse framerate '%s'.\n", dc1394->framerate);
142  goto out;
143  }
144  dc1394->frame_rate = av_rescale(1000, framerate.num, framerate.den);
145 
146  for (fmt = dc1394_frame_formats; fmt->width; fmt++)
147  if (fmt->pix_fmt == pix_fmt && fmt->width == width && fmt->height == height)
148  break;
149 
150  for (fps = dc1394_frame_rates; fps->frame_rate; fps++)
151  if (fps->frame_rate == dc1394->frame_rate)
152  break;
153 
154  if (!fps->frame_rate || !fmt->width) {
155  av_log(c, AV_LOG_ERROR, "Can't find matching camera format for %s, %dx%d@%d:1000fps\n", av_get_pix_fmt_name(pix_fmt),
156  width, height, dc1394->frame_rate);
157  ret = AVERROR(EINVAL);
158  goto out;
159  }
160 
161  /* create a video stream */
162  vst = avformat_new_stream(c, NULL);
163  if (!vst) {
164  ret = AVERROR(ENOMEM);
165  goto out;
166  }
167  avpriv_set_pts_info(vst, 64, 1, 1000);
170  vst->codec->time_base.den = framerate.num;
171  vst->codec->time_base.num = framerate.den;
172  vst->codec->width = fmt->width;
173  vst->codec->height = fmt->height;
174  vst->codec->pix_fmt = fmt->pix_fmt;
175 
176  /* packet init */
177  av_init_packet(&dc1394->packet);
178  dc1394->packet.size = avpicture_get_size(fmt->pix_fmt, fmt->width, fmt->height);
179  dc1394->packet.stream_index = vst->index;
180  dc1394->packet.flags |= AV_PKT_FLAG_KEY;
181 
182  dc1394->current_frame = 0;
183 
184  vst->codec->bit_rate = av_rescale(dc1394->packet.size * 8, fps->frame_rate, 1000);
185  *select_fps = fps;
186  *select_fmt = fmt;
187 out:
188  return ret;
189 }
190 
191 #if HAVE_LIBDC1394_1
192 static int dc1394_v1_read_header(AVFormatContext *c)
193 {
194  dc1394_data* dc1394 = c->priv_data;
195  AVStream* vst;
196  nodeid_t* camera_nodes;
197  int res;
198  struct dc1394_frame_format *fmt = NULL;
199  struct dc1394_frame_rate *fps = NULL;
200 
201  if (dc1394_read_common(c, &fmt, &fps) != 0)
202  return -1;
203 
204  /* Now let us prep the hardware. */
205  dc1394->handle = dc1394_create_handle(0); /* FIXME: gotta have ap->port */
206  if (!dc1394->handle) {
207  av_log(c, AV_LOG_ERROR, "Can't acquire dc1394 handle on port %d\n", 0 /* ap->port */);
208  goto out;
209  }
210  camera_nodes = dc1394_get_camera_nodes(dc1394->handle, &res, 1);
211  if (!camera_nodes || camera_nodes[dc1394->channel] == DC1394_NO_CAMERA) {
212  av_log(c, AV_LOG_ERROR, "There's no IIDC camera on the channel %d\n", dc1394->channel);
213  goto out_handle;
214  }
215  res = dc1394_dma_setup_capture(dc1394->handle, camera_nodes[dc1394->channel],
216  0,
217  FORMAT_VGA_NONCOMPRESSED,
218  fmt->frame_size_id,
219  SPEED_400,
220  fps->frame_rate_id, 8, 1,
221  c->filename,
222  &dc1394->camera);
223  dc1394_free_camera_nodes(camera_nodes);
224  if (res != DC1394_SUCCESS) {
225  av_log(c, AV_LOG_ERROR, "Can't prepare camera for the DMA capture\n");
226  goto out_handle;
227  }
228 
229  res = dc1394_start_iso_transmission(dc1394->handle, dc1394->camera.node);
230  if (res != DC1394_SUCCESS) {
231  av_log(c, AV_LOG_ERROR, "Can't start isochronous transmission\n");
232  goto out_handle_dma;
233  }
234 
235  return 0;
236 
237 out_handle_dma:
238  dc1394_dma_unlisten(dc1394->handle, &dc1394->camera);
239  dc1394_dma_release_camera(dc1394->handle, &dc1394->camera);
240 out_handle:
241  dc1394_destroy_handle(dc1394->handle);
242 out:
243  return -1;
244 }
245 
246 static int dc1394_v1_read_packet(AVFormatContext *c, AVPacket *pkt)
247 {
248  struct dc1394_data *dc1394 = c->priv_data;
249  int res;
250 
251  /* discard stale frame */
252  if (dc1394->current_frame++) {
253  if (dc1394_dma_done_with_buffer(&dc1394->camera) != DC1394_SUCCESS)
254  av_log(c, AV_LOG_ERROR, "failed to release %d frame\n", dc1394->current_frame);
255  }
256 
257  res = dc1394_dma_single_capture(&dc1394->camera);
258 
259  if (res == DC1394_SUCCESS) {
260  dc1394->packet.data = (uint8_t *)(dc1394->camera.capture_buffer);
261  dc1394->packet.pts = (dc1394->current_frame * 1000000) / dc1394->frame_rate;
262  res = dc1394->packet.size;
263  } else {
264  av_log(c, AV_LOG_ERROR, "DMA capture failed\n");
265  dc1394->packet.data = NULL;
266  res = -1;
267  }
268 
269  *pkt = dc1394->packet;
270  return res;
271 }
272 
273 static int dc1394_v1_close(AVFormatContext * context)
274 {
275  struct dc1394_data *dc1394 = context->priv_data;
276 
277  dc1394_stop_iso_transmission(dc1394->handle, dc1394->camera.node);
278  dc1394_dma_unlisten(dc1394->handle, &dc1394->camera);
279  dc1394_dma_release_camera(dc1394->handle, &dc1394->camera);
280  dc1394_destroy_handle(dc1394->handle);
281 
282  return 0;
283 }
284 
285 #elif HAVE_LIBDC1394_2
286 static int dc1394_v2_read_header(AVFormatContext *c)
287 {
288  dc1394_data* dc1394 = c->priv_data;
289  dc1394camera_list_t *list;
290  int res, i;
291  struct dc1394_frame_format *fmt = NULL;
292  struct dc1394_frame_rate *fps = NULL;
293 
294  if (dc1394_read_common(c, &fmt, &fps) != 0)
295  return -1;
296 
297  /* Now let us prep the hardware. */
298  dc1394->d = dc1394_new();
299  dc1394_camera_enumerate (dc1394->d, &list);
300  if ( !list || list->num == 0) {
301  av_log(c, AV_LOG_ERROR, "Unable to look for an IIDC camera\n\n");
302  goto out;
303  }
304 
305  /* FIXME: To select a specific camera I need to search in list its guid */
306  dc1394->camera = dc1394_camera_new (dc1394->d, list->ids[0].guid);
307  if (list->num > 1) {
308  av_log(c, AV_LOG_INFO, "Working with the first camera found\n");
309  }
310 
311  /* Freeing list of cameras */
312  dc1394_camera_free_list (list);
313 
314  /* Select MAX Speed possible from the cam */
315  if (dc1394->camera->bmode_capable>0) {
316  dc1394_video_set_operation_mode(dc1394->camera, DC1394_OPERATION_MODE_1394B);
317  i = DC1394_ISO_SPEED_800;
318  } else {
319  i = DC1394_ISO_SPEED_400;
320  }
321 
322  for (res = DC1394_FAILURE; i >= DC1394_ISO_SPEED_MIN && res != DC1394_SUCCESS; i--) {
323  res=dc1394_video_set_iso_speed(dc1394->camera, i);
324  }
325  if (res != DC1394_SUCCESS) {
326  av_log(c, AV_LOG_ERROR, "Couldn't set ISO Speed\n");
327  goto out_camera;
328  }
329 
330  if (dc1394_video_set_mode(dc1394->camera, fmt->frame_size_id) != DC1394_SUCCESS) {
331  av_log(c, AV_LOG_ERROR, "Couldn't set video format\n");
332  goto out_camera;
333  }
334 
335  if (dc1394_video_set_framerate(dc1394->camera,fps->frame_rate_id) != DC1394_SUCCESS) {
336  av_log(c, AV_LOG_ERROR, "Couldn't set framerate %d \n",fps->frame_rate);
337  goto out_camera;
338  }
339  if (dc1394_capture_setup(dc1394->camera, 10, DC1394_CAPTURE_FLAGS_DEFAULT)!=DC1394_SUCCESS) {
340  av_log(c, AV_LOG_ERROR, "Cannot setup camera \n");
341  goto out_camera;
342  }
343 
344  if (dc1394_video_set_transmission(dc1394->camera, DC1394_ON) !=DC1394_SUCCESS) {
345  av_log(c, AV_LOG_ERROR, "Cannot start capture\n");
346  goto out_camera;
347  }
348  return 0;
349 
350 out_camera:
351  dc1394_capture_stop(dc1394->camera);
352  dc1394_video_set_transmission(dc1394->camera, DC1394_OFF);
353  dc1394_camera_free (dc1394->camera);
354 out:
355  dc1394_free(dc1394->d);
356  return -1;
357 }
358 
359 static int dc1394_v2_read_packet(AVFormatContext *c, AVPacket *pkt)
360 {
361  struct dc1394_data *dc1394 = c->priv_data;
362  int res;
363 
364  /* discard stale frame */
365  if (dc1394->current_frame++) {
366  if (dc1394_capture_enqueue(dc1394->camera, dc1394->frame) != DC1394_SUCCESS)
367  av_log(c, AV_LOG_ERROR, "failed to release %d frame\n", dc1394->current_frame);
368  }
369 
370  res = dc1394_capture_dequeue(dc1394->camera, DC1394_CAPTURE_POLICY_WAIT, &dc1394->frame);
371  if (res == DC1394_SUCCESS) {
372  dc1394->packet.data = (uint8_t *) dc1394->frame->image;
373  dc1394->packet.pts = dc1394->current_frame * 1000000 / dc1394->frame_rate;
374  res = dc1394->frame->image_bytes;
375  } else {
376  av_log(c, AV_LOG_ERROR, "DMA capture failed\n");
377  dc1394->packet.data = NULL;
378  res = -1;
379  }
380 
381  *pkt = dc1394->packet;
382  return res;
383 }
384 
385 static int dc1394_v2_close(AVFormatContext * context)
386 {
387  struct dc1394_data *dc1394 = context->priv_data;
388 
389  dc1394_video_set_transmission(dc1394->camera, DC1394_OFF);
390  dc1394_capture_stop(dc1394->camera);
391  dc1394_camera_free(dc1394->camera);
392  dc1394_free(dc1394->d);
393 
394  return 0;
395 }
396 
397 AVInputFormat ff_libdc1394_demuxer = {
398  .name = "libdc1394",
399  .long_name = NULL_IF_CONFIG_SMALL("dc1394 v.2 A/V grab"),
400  .priv_data_size = sizeof(struct dc1394_data),
401  .read_header = dc1394_v2_read_header,
402  .read_packet = dc1394_v2_read_packet,
403  .read_close = dc1394_v2_close,
404  .flags = AVFMT_NOFILE,
405  .priv_class = &libdc1394_class,
406 };
407 
408 #endif
409 #if HAVE_LIBDC1394_1
410 AVInputFormat ff_libdc1394_demuxer = {
411  .name = "libdc1394",
412  .long_name = NULL_IF_CONFIG_SMALL("dc1394 v.1 A/V grab"),
413  .priv_data_size = sizeof(struct dc1394_data),
414  .read_header = dc1394_v1_read_header,
415  .read_packet = dc1394_v1_read_packet,
416  .read_close = dc1394_v1_close,
417  .flags = AVFMT_NOFILE,
418  .priv_class = &libdc1394_class,
419 };
420 #endif
packed YUV 4:2:2, 16bpp, Cb Y0 Cr Y1
Definition: pixfmt.h:84
int av_parse_video_rate(AVRational *rate, const char *arg)
Parse str and store the detected values in *rate.
Definition: parseutils.c:122
AVOption.
Definition: opt.h:234
int av_parse_video_size(int *width_ptr, int *height_ptr, const char *str)
Parse str and put in width_ptr and height_ptr the detected values.
Definition: parseutils.c:95
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:2829
int num
numerator
Definition: rational.h:44
int index
stream index in AVFormatContext
Definition: avformat.h:700
int size
Definition: avcodec.h:974
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1270
struct dc1394_frame_rate dc1394_frame_rates[]
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avcodec.h:1175
Format I/O context.
Definition: avformat.h:922
char * framerate
Set by a private option.
Definition: libdc1394.c:66
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:38
uint8_t
AVOptions.
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:2521
uint8_t * data
Definition: avcodec.h:973
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1019
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:123
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:145
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:169
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:979
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:718
int bit_rate
the average bitrate
Definition: avcodec.h:1114
char filename[1024]
input or output filename
Definition: avformat.h:998
int64_t av_rescale(int64_t a, int64_t b, int64_t c)
Rescale a 64-bit integer with rounding to nearest.
Definition: mathematics.c:116
#define OFFSET(x)
Definition: libdc1394.c:98
int width
picture width / height.
Definition: avcodec.h:1229
enum AVPixelFormat pix_fmt
Definition: libdc1394.c:74
enum AVPixelFormat pix_fmt
Definition: movenc.c:843
LIBAVUTIL_VERSION_INT
Definition: eval.c:55
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:544
Stream structure.
Definition: avformat.h:699
NULL
Definition: eval.c:55
char * pixel_format
Set by a private option.
Definition: libdc1394.c:65
static int width
Definition: utils.c:156
#define AV_LOG_INFO
Standard information.
Definition: log.h:134
enum AVMediaType codec_type
Definition: avcodec.h:1058
enum AVCodecID codec_id
Definition: avcodec.h:1067
av_default_item_name
Definition: dnxhdenc.c:52
static const AVOption options[]
Definition: libdc1394.c:100
static int dc1394_read_common(AVFormatContext *c, struct dc1394_frame_format **select_fmt, struct dc1394_frame_rate **select_fps)
Definition: libdc1394.c:118
static const AVClass libdc1394_class
Definition: libdc1394.c:110
Describe the class of an AVClass context structure.
Definition: log.h:33
rational number numerator/denominator
Definition: rational.h:43
#define AV_OPT_FLAG_DECODING_PARAM
a generic parameter which can be set by the user for demuxing or decoding
Definition: opt.h:265
misc parsing utilities
int height
Definition: gxfenc.c:72
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt)>2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);returnNULL;}returnac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_dlog(ac->avr,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> out
Main libavformat public API header.
int frame_rate
frames per 1000 seconds (fps * 1000)
Definition: libdc1394.c:63
#define AVFMT_NOFILE
Demuxer will use avio_open, no opened file should be provided by the caller.
Definition: avformat.h:409
char * video_size
String describing video size, set by a private option.
Definition: libdc1394.c:64
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:47
int den
denominator
Definition: rational.h:45
struct dc1394_frame_format dc1394_frame_formats[]
void * priv_data
Format private data.
Definition: avformat.h:950
int avpicture_get_size(enum AVPixelFormat pix_fmt, int width, int height)
Calculate the size in bytes that a picture of the given width and height would occupy if stored in th...
Definition: avpicture.c:85
#define DEC
Definition: libdc1394.c:99
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:525
enum AVPixelFormat av_get_pix_fmt(const char *name)
Return the pixel format corresponding to name.
Definition: pixdesc.c:1552
const char * av_get_pix_fmt_name(enum AVPixelFormat pix_fmt)
Return the short name for a pixel format, NULL in case pix_fmt is unknown.
Definition: pixdesc.c:1540
int stream_index
Definition: avcodec.h:975
AVPacket packet
Definition: libdc1394.c:68
packed YUV 4:1:1, 12bpp, Cb Y0 Y1 Cr Y2 Y3
Definition: pixfmt.h:85
AVPixelFormat
Pixel format.
Definition: pixfmt.h:63
This structure stores compressed data.
Definition: avcodec.h:950
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:966
int current_frame
Definition: libdc1394.c:62