diff options
Diffstat (limited to 'src/libffmpeg/libavcodec/dvdata.h')
| -rw-r--r-- | src/libffmpeg/libavcodec/dvdata.h | 116 |
1 files changed, 103 insertions, 13 deletions
diff --git a/src/libffmpeg/libavcodec/dvdata.h b/src/libffmpeg/libavcodec/dvdata.h index bab69133e..16b5786a8 100644 --- a/src/libffmpeg/libavcodec/dvdata.h +++ b/src/libffmpeg/libavcodec/dvdata.h @@ -21,11 +21,34 @@ * @file dvdata.h * Constants for DV codec. */ - + +/* + * DVprofile is used to express the differences between various + * DV flavors. For now it's primarily used for differentiating + * 525/60 and 625/50, but the plans are to use it for various + * DV specs as well (e.g. SMPTE314M vs. IEC 61834). + */ +typedef struct DVprofile { + int dsf; /* value of the dsf in the DV header */ + int frame_size; /* total size of one frame in bytes */ + int difseg_size; /* number of DIF segments */ + int frame_rate; + int frame_rate_base; + int ltc_divisor; /* FPS from the LTS standpoint */ + int height; /* picture height in pixels */ + int width; /* picture width in pixels */ + const uint16_t *video_place; /* positions of all DV macro blocks */ + enum PixelFormat pix_fmt; /* picture pixel format */ + + int audio_stride; /* size of audio_shuffle table */ + int audio_min_samples[3];/* min ammount of audio samples */ + /* for 48Khz, 44.1Khz and 32Khz */ + int audio_samples_dist[5];/* how many samples are supposed to be */ + /* in each frame in a 5 frames window */ + const uint16_t (*audio_shuffle)[9]; /* PCM shuffling table */ +} DVprofile; + #define NB_DV_VLC 409 -#define AAUX_AS_OFFSET (80*6 + 80*16*3 + 3) -#define AAUX_ASC_OFFSET (80*6 + 80*16*4 + 3) -#define VAUX_TC61_OFFSET (80*5 + 48 + 5) static const uint16_t dv_vlc_bits[409] = { 0x0000, 0x0002, 0x0007, 0x0008, 0x0009, 0x0014, 0x0015, 0x0016, @@ -283,7 +306,7 @@ static const uint8_t dv_248_areas[64] = { 1,2,2,3,3,3,3,3, }; -static uint8_t dv_quant_shifts[22][4] = { +static const uint8_t dv_quant_shifts[22][4] = { { 3,3,4,4 }, { 3,3,4,4 }, { 2,3,3,4 }, @@ -1240,7 +1263,7 @@ static const uint16_t dv_place_411[1350] = { 0x0834, 0x2320, 0x2f44, 0x3810, 0x1658, }; -static const uint16_t dv_place_audio60[10][9] = { +static const uint16_t dv_audio_shuffle525[10][9] = { { 0, 30, 60, 20, 50, 80, 10, 40, 70 }, /* 1st channel */ { 6, 36, 66, 26, 56, 86, 16, 46, 76 }, { 12, 42, 72, 2, 32, 62, 22, 52, 82 }, @@ -1254,7 +1277,7 @@ static const uint16_t dv_place_audio60[10][9] = { { 25, 55, 85, 15, 45, 75, 5, 35, 65 }, }; -static const uint16_t dv_place_audio50[12][9] = { +static const uint16_t dv_audio_shuffle625[12][9] = { { 0, 36, 72, 26, 62, 98, 16, 52, 88}, /* 1st channel */ { 6, 42, 78, 32, 68, 104, 22, 58, 94}, { 12, 48, 84, 2, 38, 74, 28, 64, 100}, @@ -1270,11 +1293,78 @@ static const uint16_t dv_place_audio50[12][9] = { { 31, 67, 103, 21, 57, 93, 11, 47, 83}, }; -static const int dv_audio_frequency[3] = { - 48000, 44100, 32000, +static const __attribute__((unused)) int dv_audio_frequency[3] = { + 48000, 44100, 32000, }; - -static const int dv_audio_min_samples[2][3] = { - { 1580, 1452, 1053 }, /* 60 fields */ - { 1896, 1742, 1264 }, /* 50 fileds */ + +static const DVprofile dv_profiles[] = { + { .dsf = 0, + .frame_size = 120000, /* IEC 61834, SMPTE-314M - 525/60 (NTSC) */ + .difseg_size = 10, + .frame_rate = 30000, + .ltc_divisor = 30, + .frame_rate_base = 1001, + .height = 480, + .width = 720, + .video_place = dv_place_411, + .pix_fmt = PIX_FMT_YUV411P, + .audio_stride = 90, + .audio_min_samples = { 1580, 1452, 1053 }, /* for 48, 44.1 and 32Khz */ + .audio_samples_dist = { 1602, 1601, 1602, 1601, 1602 }, + .audio_shuffle = dv_audio_shuffle525, + }, + { .dsf = 1, + .frame_size = 144000, /* IEC 61834 - 625/50 (PAL) */ + .difseg_size = 12, + .frame_rate = 25, + .frame_rate_base = 1, + .ltc_divisor = 25, + .height = 576, + .width = 720, + .video_place = dv_place_420, + .pix_fmt = PIX_FMT_YUV420P, + .audio_stride = 108, + .audio_min_samples = { 1896, 1742, 1264 }, /* for 48, 44.1 and 32Khz */ + .audio_samples_dist = { 1920, 1920, 1920, 1920, 1920 }, + .audio_shuffle = dv_audio_shuffle625, + }, + { .dsf = 1, + .frame_size = 144000, /* SMPTE-314M - 625/50 (PAL) */ + .difseg_size = 12, + .frame_rate = 25, + .frame_rate_base = 1, + .ltc_divisor = 25, + .height = 576, + .width = 720, + .video_place = dv_place_411P, + .pix_fmt = PIX_FMT_YUV411P, + .audio_stride = 108, + .audio_min_samples = { 1896, 1742, 1264 }, /* for 48, 44.1 and 32Khz */ + .audio_samples_dist = { 1920, 1920, 1920, 1920, 1920 }, + .audio_shuffle = dv_audio_shuffle625, + } }; + +static inline const DVprofile* dv_frame_profile(uint8_t* frame) +{ + if ((frame[3] & 0x80) == 0) { /* DSF flag */ + return &dv_profiles[0]; + } + else if ((frame[5] & 0x07) == 0) { /* APT flag */ + return &dv_profiles[1]; + } + else + return &dv_profiles[2]; +} + +static inline const DVprofile* dv_codec_profile(AVCodecContext* codec) +{ + if (codec->width != 720) { + return NULL; + } + else if (codec->height == 480) { + return &dv_profiles[0]; + } + else + return &dv_profiles[1]; +} |