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| author | Vladimir Voroshilov <voroshil@gmail.com> | 2009-06-12 23:55:06 +0700 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2011-09-24 21:11:00 +0200 |
| commit | f7980a7bedd6d0f0404bc3a98120af931c65a5c5 (patch) | |
| tree | 5fcde8ceb023be5904ccc1daa41f7f03dd082686 /libavcodec/g729dec.c | |
| parent | f830d1b7da810dfdd17c8640629b5c4793e310fb (diff) | |
| download | ffmpeg-f7980a7bedd6d0f0404bc3a98120af931c65a5c5.tar.gz | |
Convert gain pitch and gain code to arrays
Diffstat (limited to 'libavcodec/g729dec.c')
| -rw-r--r-- | libavcodec/g729dec.c | 27 |
1 files changed, 15 insertions, 12 deletions
diff --git a/libavcodec/g729dec.c b/libavcodec/g729dec.c index 8ce5eb5af0..04b6f54ec9 100644 --- a/libavcodec/g729dec.c +++ b/libavcodec/g729dec.c @@ -111,11 +111,11 @@ typedef struct { int16_t quant_energy[4]; ///< (5.10) past quantized energy - /// (1.14) pitch gain of previous subframe - int16_t gain_pitch; + /// (1.14) pitch gain of current and five previous subframes + int16_t past_gain_pitch[6]; - /// (14.1) gain code from previous subframe - int16_t gain_code; + /// (14.1) gain code from current and previous subframe + int16_t past_gain_code[2]; int16_t was_periodic; ///< whether previous frame was declared as periodic or not (4.4) uint16_t rand_value; ///< random number generator value (4.4.4) @@ -406,23 +406,26 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, ff_acelp_weighted_vector_sum(fc + pitch_delay_int, fc + pitch_delay_int, fc, 1 << 14, - av_clip(ctx->gain_pitch, SHARP_MIN, SHARP_MAX), + av_clip(ctx->past_gain_pitch[0], SHARP_MIN, SHARP_MAX), 0, 14, SUBFRAME_SIZE - pitch_delay_int); + memmove(ctx->past_gain_pitch+1, ctx->past_gain_pitch, 5 * sizeof(int16_t)); + ctx->past_gain_code[1] = ctx->past_gain_code[0]; + if (frame_erasure) { - ctx->gain_pitch = (29491 * ctx->gain_pitch) >> 15; // 0.90 (0.15) - ctx->gain_code = ( 2007 * ctx->gain_code ) >> 11; // 0.98 (0.11) + ctx->past_gain_pitch[0] = (29491 * ctx->past_gain_pitch[0]) >> 15; // 0.90 (0.15) + ctx->past_gain_code[0] = ( 2007 * ctx->past_gain_code[0] ) >> 11; // 0.98 (0.11) gain_corr_factor = 0; } else { - ctx->gain_pitch = cb_gain_1st_8k[gc_1st_index][0] + - cb_gain_2nd_8k[gc_2nd_index][0]; + ctx->past_gain_pitch[0] = cb_gain_1st_8k[gc_1st_index][0] + + cb_gain_2nd_8k[gc_2nd_index][0]; gain_corr_factor = cb_gain_1st_8k[gc_1st_index][1] + cb_gain_2nd_8k[gc_2nd_index][1]; /* Decode the fixed-codebook gain. */ - ctx->gain_code = ff_acelp_decode_gain_code(&ctx->dsp, gain_corr_factor, + ctx->past_gain_code[0] = ff_acelp_decode_gain_code(&ctx->dsp, gain_corr_factor, fc, MR_ENERGY, ctx->quant_energy, ma_prediction_coeff, @@ -439,8 +442,8 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, ff_acelp_weighted_vector_sum(ctx->exc + i * SUBFRAME_SIZE, ctx->exc + i * SUBFRAME_SIZE, fc, - (!ctx->was_periodic && frame_erasure) ? 0 : ctx->gain_pitch, - ( ctx->was_periodic && frame_erasure) ? 0 : ctx->gain_code, + (!ctx->was_periodic && frame_erasure) ? 0 : ctx->past_gain_pitch[0], + ( ctx->was_periodic && frame_erasure) ? 0 : ctx->past_gain_code[0], 1 << 13, 14, SUBFRAME_SIZE); if (frame_erasure) |