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12 * Lesser General Public License for more details.
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19 #ifndef AVCODEC_DV_PROFILE_H
20 #define AVCODEC_DV_PROFILE_H
24 #include "libavutil/pixfmt.h"
25 #include "libavutil/rational.h"
28 /* minimum number of bytes to read from a DV stream in order to
29 determine the profile */
30 #define DV_PROFILE_BYTES (6*80) /* 6 DIF blocks */
32 typedef struct DVwork_chunk {
34 uint16_t mb_coordinates[5];
38 * DVprofile is used to express the differences between various
39 * DV flavors. For now it's primarily used for differentiating
40 * 525/60 and 625/50, but the plans are to use it for various
41 * DV specs as well (e.g. SMPTE314M vs. IEC 61834).
43 typedef struct DVprofile {
44 int dsf; /* value of the dsf in the DV header */
45 int video_stype; /* stype for VAUX source pack */
46 int frame_size; /* total size of one frame in bytes */
47 int difseg_size; /* number of DIF segments per DIF channel */
48 int n_difchan; /* number of DIF channels per frame */
49 AVRational time_base; /* 1/framerate */
50 int ltc_divisor; /* FPS from the LTS standpoint */
51 int height; /* picture height in pixels */
52 int width; /* picture width in pixels */
53 AVRational sar[2]; /* sample aspect ratios for 4:3 and 16:9 */
54 DVwork_chunk *work_chunks; /* each thread gets its own chunk of frame to work on */
55 uint32_t *idct_factor; /* set of iDCT factor tables */
56 enum PixelFormat pix_fmt; /* picture pixel format */
57 int bpm; /* blocks per macroblock */
58 const uint8_t *block_sizes; /* AC block sizes, in bits */
59 int audio_stride; /* size of audio_shuffle table */
60 int audio_min_samples[3]; /* min amount of audio samples */
61 /* for 48kHz, 44.1kHz and 32kHz */
62 int audio_samples_dist[5]; /* how many samples are supposed to be */
63 /* in each frame in a 5 frames window */
64 const uint8_t (*audio_shuffle)[9]; /* PCM shuffling table */
67 const DVprofile* avpriv_dv_frame_profile(const DVprofile *sys,
68 const uint8_t* frame, unsigned buf_size);
69 const DVprofile* avpriv_dv_frame_profile2(AVCodecContext* codec, const DVprofile *sys,
70 const uint8_t* frame, unsigned buf_size);
71 const DVprofile* avpriv_dv_codec_profile(AVCodecContext* codec);
74 * Print all allowed DV profiles into logctx at specified logging level.
76 void ff_dv_print_profiles(void *logctx, int loglevel);
78 #endif /* AVCODEC_DV_PROFILE_H */