From c45e2da617d74b6f0d82208efd017d66139eabe2 Mon Sep 17 00:00:00 2001 From: Kostya Shishkov Date: Sat, 2 Jun 2012 20:30:23 +0200 Subject: [PATCH] imc: move channel-specific data into separate context This will be useful for Indeo Audio decoder which is almost the same but supports stereo. --- libavcodec/imc.c | 404 +++++++++++++++++++++++++---------------------- 1 file changed, 217 insertions(+), 187 deletions(-) diff --git a/libavcodec/imc.c b/libavcodec/imc.c index 44e15f0bca..d53693c848 100644 --- a/libavcodec/imc.c +++ b/libavcodec/imc.c @@ -49,9 +49,7 @@ #define BANDS 32 #define COEFFS 256 -typedef struct { - AVFrame frame; - +typedef struct IMCChannel { float old_floor[BANDS]; float flcoeffs1[BANDS]; float flcoeffs2[BANDS]; @@ -61,16 +59,6 @@ typedef struct { float flcoeffs6[BANDS]; float CWdecoded[COEFFS]; - /** MDCT tables */ - //@{ - float mdct_sine_window[COEFFS]; - float post_cos[COEFFS]; - float post_sin[COEFFS]; - float pre_coef1[COEFFS]; - float pre_coef2[COEFFS]; - float last_fft_im[COEFFS]; - //@} - int bandWidthT[BANDS]; ///< codewords per band int bitsBandT[BANDS]; ///< how many bits per codeword in band int CWlengthT[COEFFS]; ///< how many bits in each codeword @@ -82,9 +70,28 @@ typedef struct { int skipFlagCount[BANDS]; ///< skipped coeffients per band int skipFlags[COEFFS]; ///< skip coefficient decoding or not int codewords[COEFFS]; ///< raw codewords read from bitstream + + float last_fft_im[COEFFS]; + + int decoder_reset; +} IMCChannel; + +typedef struct { + AVFrame frame; + + IMCChannel chctx[1]; + + /** MDCT tables */ + //@{ + float mdct_sine_window[COEFFS]; + float post_cos[COEFFS]; + float post_sin[COEFFS]; + float pre_coef1[COEFFS]; + float pre_coef2[COEFFS]; + //@} + float sqrt_tab[30]; GetBitContext gb; - int decoder_reset; float one_div_log2; DSPContext dsp; @@ -115,10 +122,15 @@ static av_cold int imc_decode_init(AVCodecContext *avctx) return AVERROR_PATCHWELCOME; } - q->decoder_reset = 1; + for (j = 0; j < avctx->channels; j++) { + q->chctx[j].decoder_reset = 1; - for (i = 0; i < BANDS; i++) - q->old_floor[i] = 1.0; + for (i = 0; i < BANDS; i++) + q->chctx[j].old_floor[i] = 1.0; + + for (i = 0; i < COEFFS / 2; i++) + q->chctx[j].last_fft_im[i] = 0; + } /* Build mdct window, a simple sine window normalized with sqrt(2) */ ff_sine_window_init(q->mdct_sine_window, COEFFS); @@ -138,8 +150,6 @@ static av_cold int imc_decode_init(AVCodecContext *avctx) q->pre_coef1[i] = -(r1 + r2) * sqrt(2.0); q->pre_coef2[i] = (r1 - r2) * sqrt(2.0); } - - q->last_fft_im[i] = 0; } /* Generate a square root table */ @@ -164,8 +174,9 @@ static av_cold int imc_decode_init(AVCodecContext *avctx) return ret; } ff_dsputil_init(&q->dsp, avctx); - avctx->sample_fmt = AV_SAMPLE_FMT_FLT; - avctx->channel_layout = AV_CH_LAYOUT_MONO; + avctx->sample_fmt = AV_SAMPLE_FMT_FLT; + avctx->channel_layout = avctx->channels == 1 ? AV_CH_LAYOUT_MONO + : AV_CH_LAYOUT_STEREO; avcodec_get_frame_defaults(&q->frame); avctx->coded_frame = &q->frame; @@ -313,8 +324,8 @@ static void imc_decode_level_coefficients2(IMCContext *q, int *levlCoeffBuf, /** * Perform bit allocation depending on bits available */ -static int bit_allocation(IMCContext *q, int stream_format_code, int freebits, - int flag) +static int bit_allocation(IMCContext *q, IMCChannel *chctx, + int stream_format_code, int freebits, int flag) { int i, j; const float limit = -1.e20; @@ -333,43 +344,43 @@ static int bit_allocation(IMCContext *q, int stream_format_code, int freebits, int found_indx = 0; for (i = 0; i < BANDS; i++) - highest = FFMAX(highest, q->flcoeffs1[i]); + highest = FFMAX(highest, chctx->flcoeffs1[i]); for (i = 0; i < BANDS - 1; i++) - q->flcoeffs4[i] = q->flcoeffs3[i] - log(q->flcoeffs5[i]) / log(2); - q->flcoeffs4[BANDS - 1] = limit; + chctx->flcoeffs4[i] = chctx->flcoeffs3[i] - log(chctx->flcoeffs5[i]) / log(2); + chctx->flcoeffs4[BANDS - 1] = limit; highest = highest * 0.25; for (i = 0; i < BANDS; i++) { indx = -1; - if ((band_tab[i + 1] - band_tab[i]) == q->bandWidthT[i]) + if ((band_tab[i + 1] - band_tab[i]) == chctx->bandWidthT[i]) indx = 0; - if ((band_tab[i + 1] - band_tab[i]) > q->bandWidthT[i]) + if ((band_tab[i + 1] - band_tab[i]) > chctx->bandWidthT[i]) indx = 1; - if (((band_tab[i + 1] - band_tab[i]) / 2) >= q->bandWidthT[i]) + if (((band_tab[i + 1] - band_tab[i]) / 2) >= chctx->bandWidthT[i]) indx = 2; if (indx == -1) return AVERROR_INVALIDDATA; - q->flcoeffs4[i] += xTab[(indx * 2 + (q->flcoeffs1[i] < highest)) * 2 + flag]; + chctx->flcoeffs4[i] += xTab[(indx * 2 + (chctx->flcoeffs1[i] < highest)) * 2 + flag]; } if (stream_format_code & 0x2) { - q->flcoeffs4[0] = limit; - q->flcoeffs4[1] = limit; - q->flcoeffs4[2] = limit; - q->flcoeffs4[3] = limit; + chctx->flcoeffs4[0] = limit; + chctx->flcoeffs4[1] = limit; + chctx->flcoeffs4[2] = limit; + chctx->flcoeffs4[3] = limit; } for (i = (stream_format_code & 0x2) ? 4 : 0; i < BANDS - 1; i++) { - iacc += q->bandWidthT[i]; - summa += q->bandWidthT[i] * q->flcoeffs4[i]; + iacc += chctx->bandWidthT[i]; + summa += chctx->bandWidthT[i] * chctx->flcoeffs4[i]; } - q->bandWidthT[BANDS - 1] = 0; + chctx->bandWidthT[BANDS - 1] = 0; summa = (summa * 0.5 - freebits) / iacc; @@ -382,13 +393,13 @@ static int bit_allocation(IMCContext *q, int stream_format_code, int freebits, iacc = 0; for (j = (stream_format_code & 0x2) ? 4 : 0; j < BANDS; j++) { - cwlen = av_clipf(((q->flcoeffs4[j] * 0.5) - summa + 0.5), 0, 6); + cwlen = av_clipf(((chctx->flcoeffs4[j] * 0.5) - summa + 0.5), 0, 6); - q->bitsBandT[j] = cwlen; - summer += q->bandWidthT[j] * cwlen; + chctx->bitsBandT[j] = cwlen; + summer += chctx->bandWidthT[j] * cwlen; if (cwlen > 0) - iacc += q->bandWidthT[j]; + iacc += chctx->bandWidthT[j]; } flg = t2; @@ -405,13 +416,13 @@ static int bit_allocation(IMCContext *q, int stream_format_code, int freebits, for (i = (stream_format_code & 0x2) ? 4 : 0; i < BANDS; i++) { for (j = band_tab[i]; j < band_tab[i + 1]; j++) - q->CWlengthT[j] = q->bitsBandT[i]; + chctx->CWlengthT[j] = chctx->bitsBandT[i]; } if (freebits > summer) { for (i = 0; i < BANDS; i++) { - workT[i] = (q->bitsBandT[i] == 6) ? -1.e20 - : (q->bitsBandT[i] * -2 + q->flcoeffs4[i] - 0.415); + workT[i] = (chctx->bitsBandT[i] == 6) ? -1.e20 + : (chctx->bitsBandT[i] * -2 + chctx->flcoeffs4[i] - 0.415); } highest = 0.0; @@ -432,11 +443,11 @@ static int bit_allocation(IMCContext *q, int stream_format_code, int freebits, if (highest > -1.e20) { workT[found_indx] -= 2.0; - if (++q->bitsBandT[found_indx] == 6) + if (++chctx->bitsBandT[found_indx] == 6) workT[found_indx] = -1.e20; for (j = band_tab[found_indx]; j < band_tab[found_indx + 1] && (freebits > summer); j++) { - q->CWlengthT[j]++; + chctx->CWlengthT[j]++; summer++; } } @@ -444,7 +455,7 @@ static int bit_allocation(IMCContext *q, int stream_format_code, int freebits, } if (freebits < summer) { for (i = 0; i < BANDS; i++) { - workT[i] = q->bitsBandT[i] ? (q->bitsBandT[i] * -2 + q->flcoeffs4[i] + 1.585) + workT[i] = chctx->bitsBandT[i] ? (chctx->bitsBandT[i] * -2 + chctx->flcoeffs4[i] + 1.585) : 1.e20; } if (stream_format_code & 0x2) { @@ -466,12 +477,12 @@ static int bit_allocation(IMCContext *q, int stream_format_code, int freebits, // break; workT[low_indx] = lowest + 2.0; - if (!--q->bitsBandT[low_indx]) + if (!--chctx->bitsBandT[low_indx]) workT[low_indx] = 1.e20; for (j = band_tab[low_indx]; j < band_tab[low_indx+1] && (freebits < summer); j++) { - if (q->CWlengthT[j] > 0) { - q->CWlengthT[j]--; + if (chctx->CWlengthT[j] > 0) { + chctx->CWlengthT[j]--; summer--; } } @@ -480,54 +491,54 @@ static int bit_allocation(IMCContext *q, int stream_format_code, int freebits, return 0; } -static void imc_get_skip_coeff(IMCContext *q) +static void imc_get_skip_coeff(IMCContext *q, IMCChannel *chctx) { int i, j; - memset(q->skipFlagBits, 0, sizeof(q->skipFlagBits)); - memset(q->skipFlagCount, 0, sizeof(q->skipFlagCount)); + memset(chctx->skipFlagBits, 0, sizeof(chctx->skipFlagBits)); + memset(chctx->skipFlagCount, 0, sizeof(chctx->skipFlagCount)); for (i = 0; i < BANDS; i++) { - if (!q->bandFlagsBuf[i] || !q->bandWidthT[i]) + if (!chctx->bandFlagsBuf[i] || !chctx->bandWidthT[i]) continue; - if (!q->skipFlagRaw[i]) { - q->skipFlagBits[i] = band_tab[i + 1] - band_tab[i]; + if (!chctx->skipFlagRaw[i]) { + chctx->skipFlagBits[i] = band_tab[i + 1] - band_tab[i]; for (j = band_tab[i]; j < band_tab[i + 1]; j++) { - q->skipFlags[j] = get_bits1(&q->gb); - if (q->skipFlags[j]) - q->skipFlagCount[i]++; + chctx->skipFlags[j] = get_bits1(&q->gb); + if (chctx->skipFlags[j]) + chctx->skipFlagCount[i]++; } } else { for (j = band_tab[i]; j < band_tab[i + 1] - 1; j += 2) { if (!get_bits1(&q->gb)) { // 0 - q->skipFlagBits[i]++; - q->skipFlags[j] = 1; - q->skipFlags[j + 1] = 1; - q->skipFlagCount[i] += 2; + chctx->skipFlagBits[i]++; + chctx->skipFlags[j] = 1; + chctx->skipFlags[j + 1] = 1; + chctx->skipFlagCount[i] += 2; } else { if (get_bits1(&q->gb)) { // 11 - q->skipFlagBits[i] += 2; - q->skipFlags[j] = 0; - q->skipFlags[j + 1] = 1; - q->skipFlagCount[i]++; + chctx->skipFlagBits[i] += 2; + chctx->skipFlags[j] = 0; + chctx->skipFlags[j + 1] = 1; + chctx->skipFlagCount[i]++; } else { - q->skipFlagBits[i] += 3; - q->skipFlags[j + 1] = 0; + chctx->skipFlagBits[i] += 3; + chctx->skipFlags[j + 1] = 0; if (!get_bits1(&q->gb)) { // 100 - q->skipFlags[j] = 1; - q->skipFlagCount[i]++; + chctx->skipFlags[j] = 1; + chctx->skipFlagCount[i]++; } else { // 101 - q->skipFlags[j] = 0; + chctx->skipFlags[j] = 0; } } } } if (j < band_tab[i + 1]) { - q->skipFlagBits[i]++; - if ((q->skipFlags[j] = get_bits1(&q->gb))) - q->skipFlagCount[i]++; + chctx->skipFlagBits[i]++; + if ((chctx->skipFlags[j] = get_bits1(&q->gb))) + chctx->skipFlagCount[i]++; } } } @@ -536,7 +547,8 @@ static void imc_get_skip_coeff(IMCContext *q) /** * Increase highest' band coefficient sizes as some bits won't be used */ -static void imc_adjust_bit_allocation(IMCContext *q, int summer) +static void imc_adjust_bit_allocation(IMCContext *q, IMCChannel *chctx, + int summer) { float workT[32]; int corrected = 0; @@ -545,8 +557,8 @@ static void imc_adjust_bit_allocation(IMCContext *q, int summer) int found_indx = 0; for (i = 0; i < BANDS; i++) { - workT[i] = (q->bitsBandT[i] == 6) ? -1.e20 - : (q->bitsBandT[i] * -2 + q->flcoeffs4[i] - 0.415); + workT[i] = (chctx->bitsBandT[i] == 6) ? -1.e20 + : (chctx->bitsBandT[i] * -2 + chctx->flcoeffs4[i] - 0.415); } while (corrected < summer) { @@ -564,12 +576,12 @@ static void imc_adjust_bit_allocation(IMCContext *q, int summer) if (highest > -1.e20) { workT[found_indx] -= 2.0; - if (++(q->bitsBandT[found_indx]) == 6) + if (++(chctx->bitsBandT[found_indx]) == 6) workT[found_indx] = -1.e20; for (j = band_tab[found_indx]; j < band_tab[found_indx+1] && (corrected < summer); j++) { - if (!q->skipFlags[j] && (q->CWlengthT[j] < 6)) { - q->CWlengthT[j]++; + if (!chctx->skipFlags[j] && (chctx->CWlengthT[j] < 6)) { + chctx->CWlengthT[j]++; corrected++; } } @@ -577,17 +589,17 @@ static void imc_adjust_bit_allocation(IMCContext *q, int summer) } } -static void imc_imdct256(IMCContext *q) +static void imc_imdct256(IMCContext *q, IMCChannel *chctx) { int i; float re, im; /* prerotation */ for (i = 0; i < COEFFS / 2; i++) { - q->samples[i].re = -(q->pre_coef1[i] * q->CWdecoded[COEFFS - 1 - i * 2]) - - (q->pre_coef2[i] * q->CWdecoded[i * 2]); - q->samples[i].im = (q->pre_coef2[i] * q->CWdecoded[COEFFS - 1 - i * 2]) - - (q->pre_coef1[i] * q->CWdecoded[i * 2]); + q->samples[i].re = -(q->pre_coef1[i] * chctx->CWdecoded[COEFFS - 1 - i * 2]) - + (q->pre_coef2[i] * chctx->CWdecoded[i * 2]); + q->samples[i].im = (q->pre_coef2[i] * chctx->CWdecoded[COEFFS - 1 - i * 2]) - + (q->pre_coef1[i] * chctx->CWdecoded[i * 2]); } /* FFT */ @@ -598,15 +610,16 @@ static void imc_imdct256(IMCContext *q) for (i = 0; i < COEFFS / 2; i++) { re = ( q->samples[i].re * q->post_cos[i]) + (-q->samples[i].im * q->post_sin[i]); im = (-q->samples[i].im * q->post_cos[i]) - ( q->samples[i].re * q->post_sin[i]); - q->out_samples[i * 2] = (q->mdct_sine_window[COEFFS - 1 - i * 2] * q->last_fft_im[i]) + q->out_samples[i * 2] = (q->mdct_sine_window[COEFFS - 1 - i * 2] * chctx->last_fft_im[i]) + (q->mdct_sine_window[i * 2] * re); - q->out_samples[COEFFS - 1 - i * 2] = (q->mdct_sine_window[i * 2] * q->last_fft_im[i]) + q->out_samples[COEFFS - 1 - i * 2] = (q->mdct_sine_window[i * 2] * chctx->last_fft_im[i]) - (q->mdct_sine_window[COEFFS - 1 - i * 2] * re); - q->last_fft_im[i] = im; + chctx->last_fft_im[i] = im; } } -static int inverse_quant_coeff(IMCContext *q, int stream_format_code) +static int inverse_quant_coeff(IMCContext *q, IMCChannel *chctx, + int stream_format_code) { int i, j; int middle_value, cw_len, max_size; @@ -614,30 +627,30 @@ static int inverse_quant_coeff(IMCContext *q, int stream_format_code) for (i = 0; i < BANDS; i++) { for (j = band_tab[i]; j < band_tab[i + 1]; j++) { - q->CWdecoded[j] = 0; - cw_len = q->CWlengthT[j]; + chctx->CWdecoded[j] = 0; + cw_len = chctx->CWlengthT[j]; - if (cw_len <= 0 || q->skipFlags[j]) + if (cw_len <= 0 || chctx->skipFlags[j]) continue; max_size = 1 << cw_len; middle_value = max_size >> 1; - if (q->codewords[j] >= max_size || q->codewords[j] < 0) + if (chctx->codewords[j] >= max_size || chctx->codewords[j] < 0) return AVERROR_INVALIDDATA; if (cw_len >= 4) { quantizer = imc_quantizer2[(stream_format_code & 2) >> 1]; - if (q->codewords[j] >= middle_value) - q->CWdecoded[j] = quantizer[q->codewords[j] - 8] * q->flcoeffs6[i]; + if (chctx->codewords[j] >= middle_value) + chctx->CWdecoded[j] = quantizer[chctx->codewords[j] - 8] * chctx->flcoeffs6[i]; else - q->CWdecoded[j] = -quantizer[max_size - q->codewords[j] - 8 - 1] * q->flcoeffs6[i]; + chctx->CWdecoded[j] = -quantizer[max_size - chctx->codewords[j] - 8 - 1] * chctx->flcoeffs6[i]; }else{ - quantizer = imc_quantizer1[((stream_format_code & 2) >> 1) | (q->bandFlagsBuf[i] << 1)]; - if (q->codewords[j] >= middle_value) - q->CWdecoded[j] = quantizer[q->codewords[j] - 1] * q->flcoeffs6[i]; + quantizer = imc_quantizer1[((stream_format_code & 2) >> 1) | (chctx->bandFlagsBuf[i] << 1)]; + if (chctx->codewords[j] >= middle_value) + chctx->CWdecoded[j] = quantizer[chctx->codewords[j] - 1] * chctx->flcoeffs6[i]; else - q->CWdecoded[j] = -quantizer[max_size - 2 - q->codewords[j]] * q->flcoeffs6[i]; + chctx->CWdecoded[j] = -quantizer[max_size - 2 - chctx->codewords[j]] * chctx->flcoeffs6[i]; } } } @@ -645,16 +658,16 @@ static int inverse_quant_coeff(IMCContext *q, int stream_format_code) } -static int imc_get_coeffs(IMCContext *q) +static int imc_get_coeffs(IMCContext *q, IMCChannel *chctx) { int i, j, cw_len, cw; for (i = 0; i < BANDS; i++) { - if (!q->sumLenArr[i]) + if (!chctx->sumLenArr[i]) continue; - if (q->bandFlagsBuf[i] || q->bandWidthT[i]) { + if (chctx->bandFlagsBuf[i] || chctx->bandWidthT[i]) { for (j = band_tab[i]; j < band_tab[i + 1]; j++) { - cw_len = q->CWlengthT[j]; + cw_len = chctx->CWlengthT[j]; cw = 0; if (get_bits_count(&q->gb) + cw_len > 512) { @@ -662,47 +675,25 @@ static int imc_get_coeffs(IMCContext *q) return AVERROR_INVALIDDATA; } - if (cw_len && (!q->bandFlagsBuf[i] || !q->skipFlags[j])) + if (cw_len && (!chctx->bandFlagsBuf[i] || !chctx->skipFlags[j])) cw = get_bits(&q->gb, cw_len); - q->codewords[j] = cw; + chctx->codewords[j] = cw; } } } return 0; } -static int imc_decode_frame(AVCodecContext *avctx, void *data, - int *got_frame_ptr, AVPacket *avpkt) +static int imc_decode_block(AVCodecContext *avctx, IMCContext *q, int ch) { - const uint8_t *buf = avpkt->data; - int buf_size = avpkt->size; - - IMCContext *q = avctx->priv_data; - int stream_format_code; int imc_hdr, i, j, ret; int flag; int bits, summer; int counter, bitscount; - LOCAL_ALIGNED_16(uint16_t, buf16, [IMC_BLOCK_SIZE / 2]); + IMCChannel *chctx = q->chctx + ch; - if (buf_size < IMC_BLOCK_SIZE) { - av_log(avctx, AV_LOG_ERROR, "imc frame too small!\n"); - return AVERROR_INVALIDDATA; - } - - /* get output buffer */ - q->frame.nb_samples = COEFFS; - if ((ret = avctx->get_buffer(avctx, &q->frame)) < 0) { - av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); - return ret; - } - q->out_samples = (float*)q->frame.data[0]; - - q->dsp.bswap16_buf(buf16, (const uint16_t*)buf, IMC_BLOCK_SIZE / 2); - - init_get_bits(&q->gb, (const uint8_t*)buf16, IMC_BLOCK_SIZE * 8); /* Check the frame header */ imc_hdr = get_bits(&q->gb, 9); @@ -721,90 +712,90 @@ static int imc_decode_frame(AVCodecContext *avctx, void *data, // av_log(avctx, AV_LOG_DEBUG, "stream_format_code = %d\n", stream_format_code); if (stream_format_code & 0x04) - q->decoder_reset = 1; + chctx->decoder_reset = 1; - if (q->decoder_reset) { + if (chctx->decoder_reset) { memset(q->out_samples, 0, sizeof(q->out_samples)); for (i = 0; i < BANDS; i++) - q->old_floor[i] = 1.0; + chctx->old_floor[i] = 1.0; for (i = 0; i < COEFFS; i++) - q->CWdecoded[i] = 0; - q->decoder_reset = 0; + chctx->CWdecoded[i] = 0; + chctx->decoder_reset = 0; } flag = get_bits1(&q->gb); - imc_read_level_coeffs(q, stream_format_code, q->levlCoeffBuf); + imc_read_level_coeffs(q, stream_format_code, chctx->levlCoeffBuf); if (stream_format_code & 0x4) - imc_decode_level_coefficients(q, q->levlCoeffBuf, - q->flcoeffs1, q->flcoeffs2); + imc_decode_level_coefficients(q, chctx->levlCoeffBuf, + chctx->flcoeffs1, chctx->flcoeffs2); else - imc_decode_level_coefficients2(q, q->levlCoeffBuf, q->old_floor, - q->flcoeffs1, q->flcoeffs2); + imc_decode_level_coefficients2(q, chctx->levlCoeffBuf, chctx->old_floor, + chctx->flcoeffs1, chctx->flcoeffs2); - memcpy(q->old_floor, q->flcoeffs1, 32 * sizeof(float)); + memcpy(chctx->old_floor, chctx->flcoeffs1, 32 * sizeof(float)); counter = 0; for (i = 0; i < BANDS; i++) { - if (q->levlCoeffBuf[i] == 16) { - q->bandWidthT[i] = 0; + if (chctx->levlCoeffBuf[i] == 16) { + chctx->bandWidthT[i] = 0; counter++; } else - q->bandWidthT[i] = band_tab[i + 1] - band_tab[i]; + chctx->bandWidthT[i] = band_tab[i + 1] - band_tab[i]; } - memset(q->bandFlagsBuf, 0, BANDS * sizeof(int)); + memset(chctx->bandFlagsBuf, 0, BANDS * sizeof(int)); for (i = 0; i < BANDS - 1; i++) { - if (q->bandWidthT[i]) - q->bandFlagsBuf[i] = get_bits1(&q->gb); + if (chctx->bandWidthT[i]) + chctx->bandFlagsBuf[i] = get_bits1(&q->gb); } - imc_calculate_coeffs(q, q->flcoeffs1, q->flcoeffs2, q->bandWidthT, q->flcoeffs3, q->flcoeffs5); + imc_calculate_coeffs(q, chctx->flcoeffs1, chctx->flcoeffs2, chctx->bandWidthT, chctx->flcoeffs3, chctx->flcoeffs5); bitscount = 0; /* first 4 bands will be assigned 5 bits per coefficient */ if (stream_format_code & 0x2) { bitscount += 15; - q->bitsBandT[0] = 5; - q->CWlengthT[0] = 5; - q->CWlengthT[1] = 5; - q->CWlengthT[2] = 5; + chctx->bitsBandT[0] = 5; + chctx->CWlengthT[0] = 5; + chctx->CWlengthT[1] = 5; + chctx->CWlengthT[2] = 5; for (i = 1; i < 4; i++) { - bits = (q->levlCoeffBuf[i] == 16) ? 0 : 5; - q->bitsBandT[i] = bits; + bits = (chctx->levlCoeffBuf[i] == 16) ? 0 : 5; + chctx->bitsBandT[i] = bits; for (j = band_tab[i]; j < band_tab[i + 1]; j++) { - q->CWlengthT[j] = bits; + chctx->CWlengthT[j] = bits; bitscount += bits; } } } - if ((ret = bit_allocation(q, stream_format_code, + if ((ret = bit_allocation(q, chctx, stream_format_code, 512 - bitscount - get_bits_count(&q->gb), flag)) < 0) { av_log(avctx, AV_LOG_ERROR, "Bit allocations failed\n"); - q->decoder_reset = 1; + chctx->decoder_reset = 1; return ret; } for (i = 0; i < BANDS; i++) { - q->sumLenArr[i] = 0; - q->skipFlagRaw[i] = 0; + chctx->sumLenArr[i] = 0; + chctx->skipFlagRaw[i] = 0; for (j = band_tab[i]; j < band_tab[i + 1]; j++) - q->sumLenArr[i] += q->CWlengthT[j]; - if (q->bandFlagsBuf[i]) - if ((((band_tab[i + 1] - band_tab[i]) * 1.5) > q->sumLenArr[i]) && (q->sumLenArr[i] > 0)) - q->skipFlagRaw[i] = 1; + chctx->sumLenArr[i] += chctx->CWlengthT[j]; + if (chctx->bandFlagsBuf[i]) + if ((((band_tab[i + 1] - band_tab[i]) * 1.5) > chctx->sumLenArr[i]) && (chctx->sumLenArr[i] > 0)) + chctx->skipFlagRaw[i] = 1; } - imc_get_skip_coeff(q); + imc_get_skip_coeff(q, chctx); for (i = 0; i < BANDS; i++) { - q->flcoeffs6[i] = q->flcoeffs1[i]; + chctx->flcoeffs6[i] = chctx->flcoeffs1[i]; /* band has flag set and at least one coded coefficient */ - if (q->bandFlagsBuf[i] && (band_tab[i + 1] - band_tab[i]) != q->skipFlagCount[i]) { - q->flcoeffs6[i] *= q->sqrt_tab[ band_tab[i + 1] - band_tab[i]] / - q->sqrt_tab[(band_tab[i + 1] - band_tab[i] - q->skipFlagCount[i])]; + if (chctx->bandFlagsBuf[i] && (band_tab[i + 1] - band_tab[i]) != chctx->skipFlagCount[i]) { + chctx->flcoeffs6[i] *= q->sqrt_tab[ band_tab[i + 1] - band_tab[i]] / + q->sqrt_tab[(band_tab[i + 1] - band_tab[i] - chctx->skipFlagCount[i])]; } } @@ -812,49 +803,88 @@ static int imc_decode_frame(AVCodecContext *avctx, void *data, bits = summer = 0; for (i = 0; i < BANDS; i++) { - if (q->bandFlagsBuf[i]) { + if (chctx->bandFlagsBuf[i]) { for (j = band_tab[i]; j < band_tab[i + 1]; j++) { - if (q->skipFlags[j]) { - summer += q->CWlengthT[j]; - q->CWlengthT[j] = 0; + if (chctx->skipFlags[j]) { + summer += chctx->CWlengthT[j]; + chctx->CWlengthT[j] = 0; } } - bits += q->skipFlagBits[i]; - summer -= q->skipFlagBits[i]; + bits += chctx->skipFlagBits[i]; + summer -= chctx->skipFlagBits[i]; } } - imc_adjust_bit_allocation(q, summer); + imc_adjust_bit_allocation(q, chctx, summer); for (i = 0; i < BANDS; i++) { - q->sumLenArr[i] = 0; + chctx->sumLenArr[i] = 0; for (j = band_tab[i]; j < band_tab[i + 1]; j++) - if (!q->skipFlags[j]) - q->sumLenArr[i] += q->CWlengthT[j]; + if (!chctx->skipFlags[j]) + chctx->sumLenArr[i] += chctx->CWlengthT[j]; } - memset(q->codewords, 0, sizeof(q->codewords)); + memset(chctx->codewords, 0, sizeof(chctx->codewords)); - if (imc_get_coeffs(q) < 0) { + if (imc_get_coeffs(q, chctx) < 0) { av_log(avctx, AV_LOG_ERROR, "Read coefficients failed\n"); - q->decoder_reset = 1; + chctx->decoder_reset = 1; return AVERROR_INVALIDDATA; } - if (inverse_quant_coeff(q, stream_format_code) < 0) { + if (inverse_quant_coeff(q, chctx, stream_format_code) < 0) { av_log(avctx, AV_LOG_ERROR, "Inverse quantization of coefficients failed\n"); - q->decoder_reset = 1; + chctx->decoder_reset = 1; return AVERROR_INVALIDDATA; } - memset(q->skipFlags, 0, sizeof(q->skipFlags)); + memset(chctx->skipFlags, 0, sizeof(chctx->skipFlags)); - imc_imdct256(q); + imc_imdct256(q, chctx); + + return 0; +} + +static int imc_decode_frame(AVCodecContext *avctx, void *data, + int *got_frame_ptr, AVPacket *avpkt) +{ + const uint8_t *buf = avpkt->data; + int buf_size = avpkt->size; + int ret, i; + + IMCContext *q = avctx->priv_data; + + LOCAL_ALIGNED_16(uint16_t, buf16, [IMC_BLOCK_SIZE / 2]); + + if (buf_size < IMC_BLOCK_SIZE) { + av_log(avctx, AV_LOG_ERROR, "imc frame too small!\n"); + return AVERROR_INVALIDDATA; + } + + /* get output buffer */ + q->frame.nb_samples = COEFFS; + if ((ret = avctx->get_buffer(avctx, &q->frame)) < 0) { + av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); + return ret; + } + + for (i = 0; i < avctx->channels; i++) { + q->out_samples = (float*)q->frame.data[0] + i; + + q->dsp.bswap16_buf(buf16, (const uint16_t*)buf, IMC_BLOCK_SIZE / 2); + + init_get_bits(&q->gb, (const uint8_t*)buf16, IMC_BLOCK_SIZE * 8); + + buf += IMC_BLOCK_SIZE; + + if ((ret = imc_decode_block(avctx, q, i)) < 0) + return ret; + } *got_frame_ptr = 1; *(AVFrame *)data = q->frame; - return IMC_BLOCK_SIZE; + return IMC_BLOCK_SIZE * avctx->channels; }