diff options
Diffstat (limited to 'chromium/third_party/ffmpeg/libavcodec/mlp_parser.c')
| -rw-r--r-- | chromium/third_party/ffmpeg/libavcodec/mlp_parser.c | 193 |
1 files changed, 1 insertions, 192 deletions
diff --git a/chromium/third_party/ffmpeg/libavcodec/mlp_parser.c b/chromium/third_party/ffmpeg/libavcodec/mlp_parser.c index eb3435b6cba..9a076f6a7f4 100644 --- a/chromium/third_party/ffmpeg/libavcodec/mlp_parser.c +++ b/chromium/third_party/ffmpeg/libavcodec/mlp_parser.c @@ -26,203 +26,12 @@ #include <stdint.h> -#include "libavutil/channel_layout.h" -#include "libavutil/crc.h" #include "libavutil/internal.h" #include "get_bits.h" #include "parser.h" -#include "mlp_parser.h" +#include "mlp_parse.h" #include "mlp.h" -static const uint8_t mlp_quants[16] = { - 16, 20, 24, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, -}; - -static const uint8_t mlp_channels[32] = { - 1, 2, 3, 4, 3, 4, 5, 3, 4, 5, 4, 5, 6, 4, 5, 4, - 5, 6, 5, 5, 6, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -}; - -const uint64_t ff_mlp_layout[32] = { - AV_CH_LAYOUT_MONO, - AV_CH_LAYOUT_STEREO, - AV_CH_LAYOUT_2_1, - AV_CH_LAYOUT_QUAD, - AV_CH_LAYOUT_STEREO|AV_CH_LOW_FREQUENCY, - AV_CH_LAYOUT_2_1|AV_CH_LOW_FREQUENCY, - AV_CH_LAYOUT_QUAD|AV_CH_LOW_FREQUENCY, - AV_CH_LAYOUT_SURROUND, - AV_CH_LAYOUT_4POINT0, - AV_CH_LAYOUT_5POINT0_BACK, - AV_CH_LAYOUT_SURROUND|AV_CH_LOW_FREQUENCY, - AV_CH_LAYOUT_4POINT0|AV_CH_LOW_FREQUENCY, - AV_CH_LAYOUT_5POINT1_BACK, - AV_CH_LAYOUT_4POINT0, - AV_CH_LAYOUT_5POINT0_BACK, - AV_CH_LAYOUT_SURROUND|AV_CH_LOW_FREQUENCY, - AV_CH_LAYOUT_4POINT0|AV_CH_LOW_FREQUENCY, - AV_CH_LAYOUT_5POINT1_BACK, - AV_CH_LAYOUT_QUAD|AV_CH_LOW_FREQUENCY, - AV_CH_LAYOUT_5POINT0_BACK, - AV_CH_LAYOUT_5POINT1_BACK, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 -}; - -static const uint8_t thd_chancount[13] = { -// LR C LFE LRs LRvh LRc LRrs Cs Ts LRsd LRw Cvh LFE2 - 2, 1, 1, 2, 2, 2, 2, 1, 1, 2, 2, 1, 1 -}; - -static const uint64_t thd_layout[13] = { - AV_CH_FRONT_LEFT|AV_CH_FRONT_RIGHT, // LR - AV_CH_FRONT_CENTER, // C - AV_CH_LOW_FREQUENCY, // LFE - AV_CH_SIDE_LEFT|AV_CH_SIDE_RIGHT, // LRs - AV_CH_TOP_FRONT_LEFT|AV_CH_TOP_FRONT_RIGHT, // LRvh - AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER, // LRc - AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT, // LRrs - AV_CH_BACK_CENTER, // Cs - AV_CH_TOP_CENTER, // Ts - AV_CH_SURROUND_DIRECT_LEFT|AV_CH_SURROUND_DIRECT_RIGHT, // LRsd - AV_CH_WIDE_LEFT|AV_CH_WIDE_RIGHT, // LRw - AV_CH_TOP_FRONT_CENTER, // Cvh - AV_CH_LOW_FREQUENCY_2, // LFE2 -}; - -static int mlp_samplerate(int in) -{ - if (in == 0xF) - return 0; - - return (in & 8 ? 44100 : 48000) << (in & 7) ; -} - -static int truehd_channels(int chanmap) -{ - int channels = 0, i; - - for (i = 0; i < 13; i++) - channels += thd_chancount[i] * ((chanmap >> i) & 1); - - return channels; -} - -uint64_t ff_truehd_layout(int chanmap) -{ - int i; - uint64_t layout = 0; - - for (i = 0; i < 13; i++) - layout |= thd_layout[i] * ((chanmap >> i) & 1); - - return layout; -} - -static int mlp_get_major_sync_size(const uint8_t * buf, int bufsize) -{ - int has_extension, extensions = 0; - int size = 28; - if (bufsize < 28) - return -1; - - if (AV_RB32(buf) == 0xf8726fba) { - has_extension = buf[25] & 1; - if (has_extension) { - extensions = buf[26] >> 4; - size += 2 + extensions * 2; - } - } - return size; -} - -/** Read a major sync info header - contains high level information about - * the stream - sample rate, channel arrangement etc. Most of this - * information is not actually necessary for decoding, only for playback. - * gb must be a freshly initialized GetBitContext with no bits read. - */ - -int ff_mlp_read_major_sync(void *log, MLPHeaderInfo *mh, GetBitContext *gb) -{ - int ratebits, channel_arrangement, header_size; - uint16_t checksum; - - av_assert1(get_bits_count(gb) == 0); - - header_size = mlp_get_major_sync_size(gb->buffer, gb->size_in_bits >> 3); - if (header_size < 0 || gb->size_in_bits < header_size << 3) { - av_log(log, AV_LOG_ERROR, "packet too short, unable to read major sync\n"); - return -1; - } - - checksum = ff_mlp_checksum16(gb->buffer, header_size - 2); - if (checksum != AV_RL16(gb->buffer+header_size-2)) { - av_log(log, AV_LOG_ERROR, "major sync info header checksum error\n"); - return AVERROR_INVALIDDATA; - } - - if (get_bits_long(gb, 24) != 0xf8726f) /* Sync words */ - return AVERROR_INVALIDDATA; - - mh->stream_type = get_bits(gb, 8); - mh->header_size = header_size; - - if (mh->stream_type == 0xbb) { - mh->group1_bits = mlp_quants[get_bits(gb, 4)]; - mh->group2_bits = mlp_quants[get_bits(gb, 4)]; - - ratebits = get_bits(gb, 4); - mh->group1_samplerate = mlp_samplerate(ratebits); - mh->group2_samplerate = mlp_samplerate(get_bits(gb, 4)); - - skip_bits(gb, 11); - - mh->channel_arrangement= - channel_arrangement = get_bits(gb, 5); - mh->channels_mlp = mlp_channels[channel_arrangement]; - mh->channel_layout_mlp = ff_mlp_layout[channel_arrangement]; - } else if (mh->stream_type == 0xba) { - mh->group1_bits = 24; // TODO: Is this information actually conveyed anywhere? - mh->group2_bits = 0; - - ratebits = get_bits(gb, 4); - mh->group1_samplerate = mlp_samplerate(ratebits); - mh->group2_samplerate = 0; - - skip_bits(gb, 4); - - mh->channel_modifier_thd_stream0 = get_bits(gb, 2); - mh->channel_modifier_thd_stream1 = get_bits(gb, 2); - - mh->channel_arrangement= - channel_arrangement = get_bits(gb, 5); - mh->channels_thd_stream1 = truehd_channels(channel_arrangement); - mh->channel_layout_thd_stream1 = ff_truehd_layout(channel_arrangement); - - mh->channel_modifier_thd_stream2 = get_bits(gb, 2); - - channel_arrangement = get_bits(gb, 13); - mh->channels_thd_stream2 = truehd_channels(channel_arrangement); - mh->channel_layout_thd_stream2 = ff_truehd_layout(channel_arrangement); - } else - return AVERROR_INVALIDDATA; - - mh->access_unit_size = 40 << (ratebits & 7); - mh->access_unit_size_pow2 = 64 << (ratebits & 7); - - skip_bits_long(gb, 48); - - mh->is_vbr = get_bits1(gb); - - mh->peak_bitrate = (get_bits(gb, 15) * mh->group1_samplerate + 8) >> 4; - - mh->num_substreams = get_bits(gb, 4); - - skip_bits_long(gb, 4 + (header_size - 17) * 8); - - return 0; -} - typedef struct MLPParseContext { ParseContext pc; |