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author | Justin Ruggles <justin.ruggles@gmail.com> | 2011-10-13 00:17:05 -0400 |
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committer | Justin Ruggles <justin.ruggles@gmail.com> | 2011-10-13 16:25:59 -0400 |
commit | b84048935ec423a0c2063ffaed69b44059d0ca98 (patch) | |
tree | cabade79fe9865a0cceac10cfe41f31cd36a9cef | |
parent | 5e5ce70f192274ab8d1564170f7f9dc12d503311 (diff) | |
download | ffmpeg-streaming-b84048935ec423a0c2063ffaed69b44059d0ca98.zip ffmpeg-streaming-b84048935ec423a0c2063ffaed69b44059d0ca98.tar.gz |
truespeech: simplify truespeech_read_frame() by using get_bits()
-rw-r--r-- | libavcodec/truespeech.c | 139 |
1 files changed, 52 insertions, 87 deletions
diff --git a/libavcodec/truespeech.c b/libavcodec/truespeech.c index eec77ea..c48a9c1 100644 --- a/libavcodec/truespeech.c +++ b/libavcodec/truespeech.c @@ -21,6 +21,8 @@ #include "libavutil/intreadwrite.h" #include "avcodec.h" +#include "dsputil.h" +#include "get_bits.h" #include "truespeech_data.h" /** @@ -32,7 +34,9 @@ * TrueSpeech decoder context */ typedef struct { + DSPContext dsp; /* input data */ + uint8_t buffer[32]; int16_t vector[8]; ///< input vector: 5/5/4/4/4/3/3/3 int offset1[2]; ///< 8-bit value, used in one copying offset int offset2[4]; ///< 7-bit value, encodes offsets for copying and for two-point filter @@ -54,7 +58,7 @@ typedef struct { static av_cold int truespeech_decode_init(AVCodecContext * avctx) { -// TSContext *c = avctx->priv_data; + TSContext *c = avctx->priv_data; if (avctx->channels != 1) { av_log_ask_for_sample(avctx, "Unsupported channel count: %d\n", avctx->channels); @@ -62,97 +66,58 @@ static av_cold int truespeech_decode_init(AVCodecContext * avctx) } avctx->sample_fmt = AV_SAMPLE_FMT_S16; + + dsputil_init(&c->dsp, avctx); + return 0; } static void truespeech_read_frame(TSContext *dec, const uint8_t *input) { - uint32_t t; - - /* first dword */ - t = AV_RL32(input); - input += 4; - - dec->flag = t & 1; - - dec->vector[0] = ts_codebook[0][(t >> 1) & 0x1F]; - dec->vector[1] = ts_codebook[1][(t >> 6) & 0x1F]; - dec->vector[2] = ts_codebook[2][(t >> 11) & 0xF]; - dec->vector[3] = ts_codebook[3][(t >> 15) & 0xF]; - dec->vector[4] = ts_codebook[4][(t >> 19) & 0xF]; - dec->vector[5] = ts_codebook[5][(t >> 23) & 0x7]; - dec->vector[6] = ts_codebook[6][(t >> 26) & 0x7]; - dec->vector[7] = ts_codebook[7][(t >> 29) & 0x7]; - - /* second dword */ - t = AV_RL32(input); - input += 4; - - dec->offset2[0] = (t >> 0) & 0x7F; - dec->offset2[1] = (t >> 7) & 0x7F; - dec->offset2[2] = (t >> 14) & 0x7F; - dec->offset2[3] = (t >> 21) & 0x7F; - - dec->offset1[0] = ((t >> 28) & 0xF) << 4; - - /* third dword */ - t = AV_RL32(input); - input += 4; - - dec->pulseval[0] = (t >> 0) & 0x3FFF; - dec->pulseval[1] = (t >> 14) & 0x3FFF; - - dec->offset1[1] = (t >> 28) & 0x0F; - - /* fourth dword */ - t = AV_RL32(input); - input += 4; - - dec->pulseval[2] = (t >> 0) & 0x3FFF; - dec->pulseval[3] = (t >> 14) & 0x3FFF; - - dec->offset1[1] |= ((t >> 28) & 0x0F) << 4; - - /* fifth dword */ - t = AV_RL32(input); - input += 4; - - dec->pulsepos[0] = (t >> 4) & 0x7FFFFFF; - - dec->pulseoff[0] = (t >> 0) & 0xF; - - dec->offset1[0] |= (t >> 31) & 1; - - /* sixth dword */ - t = AV_RL32(input); - input += 4; - - dec->pulsepos[1] = (t >> 4) & 0x7FFFFFF; - - dec->pulseoff[1] = (t >> 0) & 0xF; - - dec->offset1[0] |= ((t >> 31) & 1) << 1; - - /* seventh dword */ - t = AV_RL32(input); - input += 4; - - dec->pulsepos[2] = (t >> 4) & 0x7FFFFFF; - - dec->pulseoff[2] = (t >> 0) & 0xF; - - dec->offset1[0] |= ((t >> 31) & 1) << 2; - - /* eighth dword */ - t = AV_RL32(input); - input += 4; - - dec->pulsepos[3] = (t >> 4) & 0x7FFFFFF; - - dec->pulseoff[3] = (t >> 0) & 0xF; - - dec->offset1[0] |= ((t >> 31) & 1) << 3; - + GetBitContext gb; + + dec->dsp.bswap_buf((uint32_t *)dec->buffer, (const uint32_t *)input, 8); + init_get_bits(&gb, dec->buffer, 32 * 8); + + dec->vector[7] = ts_codebook[7][get_bits(&gb, 3)]; + dec->vector[6] = ts_codebook[6][get_bits(&gb, 3)]; + dec->vector[5] = ts_codebook[5][get_bits(&gb, 3)]; + dec->vector[4] = ts_codebook[4][get_bits(&gb, 4)]; + dec->vector[3] = ts_codebook[3][get_bits(&gb, 4)]; + dec->vector[2] = ts_codebook[2][get_bits(&gb, 4)]; + dec->vector[1] = ts_codebook[1][get_bits(&gb, 5)]; + dec->vector[0] = ts_codebook[0][get_bits(&gb, 5)]; + dec->flag = get_bits1(&gb); + + dec->offset1[0] = get_bits(&gb, 4) << 4; + dec->offset2[3] = get_bits(&gb, 7); + dec->offset2[2] = get_bits(&gb, 7); + dec->offset2[1] = get_bits(&gb, 7); + dec->offset2[0] = get_bits(&gb, 7); + + dec->offset1[1] = get_bits(&gb, 4); + dec->pulseval[1] = get_bits(&gb, 14); + dec->pulseval[0] = get_bits(&gb, 14); + + dec->offset1[1] |= get_bits(&gb, 4) << 4; + dec->pulseval[3] = get_bits(&gb, 14); + dec->pulseval[2] = get_bits(&gb, 14); + + dec->offset1[0] |= get_bits1(&gb); + dec->pulsepos[0] = get_bits_long(&gb, 27); + dec->pulseoff[0] = get_bits(&gb, 4); + + dec->offset1[0] |= get_bits1(&gb) << 1; + dec->pulsepos[1] = get_bits_long(&gb, 27); + dec->pulseoff[1] = get_bits(&gb, 4); + + dec->offset1[0] |= get_bits1(&gb) << 2; + dec->pulsepos[2] = get_bits_long(&gb, 27); + dec->pulseoff[2] = get_bits(&gb, 4); + + dec->offset1[0] |= get_bits1(&gb) << 3; + dec->pulsepos[3] = get_bits_long(&gb, 27); + dec->pulseoff[3] = get_bits(&gb, 4); } static void truespeech_correlate_filter(TSContext *dec) |