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ffmpeg.wasm-core
Commit f5b7bd2a authored by Alexandra Hájková's avatar Alexandra Hájková Committed by Diego Biurrun
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imc: Convert to the new bitstream reader

parent 39ecf058
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Inline Side-by-side
Showing with 23 additions and 22 deletions
libavcodec/imc.c
View file @ f5b7bd2a
......@@ -37,9 +37,10 @@
#include "libavutil/channel_layout.h"
#include "libavutil/float_dsp.h"
#include "libavutil/internal.h"
#include "avcodec.h"
#include "bitstream.h"
#include "bswapdsp.h"
#include "get_bits.h"
#include "fft.h"
#include "internal.h"
#include "sinewin.h"
......@@ -91,7 +92,7 @@ typedef struct IMCContext {
//@}
float sqrt_tab[30];
GetBitContext gb;
BitstreamContext bc;
BswapDSPContext bdsp;
AVFloatDSPContext fdsp;
......@@ -328,12 +329,12 @@ static void imc_read_level_coeffs(IMCContext *q, int stream_format_code,
if (stream_format_code & 4)
start = 1;
if (start)
levlCoeffs[0] = get_bits(&q->gb, 7);
levlCoeffs[0] = bitstream_read(&q->bc, 7);
for (i = start; i < BANDS; i++) {
levlCoeffs[i] = get_vlc2(&q->gb, hufftab[cb_sel[i]]->table,
levlCoeffs[i] = bitstream_read_vlc(&q->bc, hufftab[cb_sel[i]]->table,
hufftab[cb_sel[i]]->bits, 2);
if (levlCoeffs[i] == 17)
levlCoeffs[i] += get_bits(&q->gb, 4);
levlCoeffs[i] += bitstream_read(&q->bc, 4);
}
}
......@@ -342,10 +343,10 @@ static void imc_read_level_coeffs_raw(IMCContext *q, int stream_format_code,
{
int i;
q->coef0_pos = get_bits(&q->gb, 5);
levlCoeffs[0] = get_bits(&q->gb, 7);
q->coef0_pos = bitstream_read(&q->bc, 5);
levlCoeffs[0] = bitstream_read(&q->bc, 7);
for (i = 1; i < BANDS; i++)
levlCoeffs[i] = get_bits(&q->gb, 4);
levlCoeffs[i] = bitstream_read(&q->bc, 4);
}
static void imc_decode_level_coefficients(IMCContext *q, int *levlCoeffBuf,
......@@ -612,19 +613,19 @@ static void imc_get_skip_coeff(IMCContext *q, IMCChannel *chctx)
chctx->skipFlagBits[i] = band_tab[i + 1] - band_tab[i];
for (j = band_tab[i]; j < band_tab[i + 1]; j++) {
chctx->skipFlags[j] = get_bits1(&q->gb);
chctx->skipFlags[j] = bitstream_read_bit(&q->bc);
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
if (!bitstream_read_bit(&q->bc)) { // 0
chctx->skipFlagBits[i]++;
chctx->skipFlags[j] = 1;
chctx->skipFlags[j + 1] = 1;
chctx->skipFlagCount[i] += 2;
} else {
if (get_bits1(&q->gb)) { // 11
if (bitstream_read_bit(&q->bc)) { // 11
chctx->skipFlagBits[i] += 2;
chctx->skipFlags[j] = 0;
chctx->skipFlags[j + 1] = 1;
......@@ -632,7 +633,7 @@ static void imc_get_skip_coeff(IMCContext *q, IMCChannel *chctx)
} else {
chctx->skipFlagBits[i] += 3;
chctx->skipFlags[j + 1] = 0;
if (!get_bits1(&q->gb)) { // 100
if (!bitstream_read_bit(&q->bc)) { // 100
chctx->skipFlags[j] = 1;
chctx->skipFlagCount[i]++;
} else { // 101
......@@ -644,7 +645,7 @@ static void imc_get_skip_coeff(IMCContext *q, IMCChannel *chctx)
if (j < band_tab[i + 1]) {
chctx->skipFlagBits[i]++;
if ((chctx->skipFlags[j] = get_bits1(&q->gb)))
if ((chctx->skipFlags[j] = bitstream_read_bit(&q->bc)))
chctx->skipFlagCount[i]++;
}
}
......@@ -781,13 +782,13 @@ static int imc_get_coeffs(IMCContext *q, IMCChannel *chctx)
cw_len = chctx->CWlengthT[j];
cw = 0;
if (get_bits_count(&q->gb) + cw_len > 512) {
if (bitstream_tell(&q->bc) + cw_len > 512) {
ff_dlog(NULL, "Band %i coeff %i cw_len %i\n", i, j, cw_len);
return AVERROR_INVALIDDATA;
}
if (cw_len && (!chctx->bandFlagsBuf[i] || !chctx->skipFlags[j]))
cw = get_bits(&q->gb, cw_len);
cw = bitstream_read(&q->bc, cw_len);
chctx->codewords[j] = cw;
}
......@@ -851,13 +852,13 @@ static int imc_decode_block(AVCodecContext *avctx, IMCContext *q, int ch)
/* Check the frame header */
imc_hdr = get_bits(&q->gb, 9);
imc_hdr = bitstream_read(&q->bc, 9);
if (imc_hdr & 0x18) {
av_log(avctx, AV_LOG_ERROR, "frame header check failed!\n");
av_log(avctx, AV_LOG_ERROR, "got %X.\n", imc_hdr);
return AVERROR_INVALIDDATA;
}
stream_format_code = get_bits(&q->gb, 3);
stream_format_code = bitstream_read(&q->bc, 3);
if (stream_format_code & 0x04)
chctx->decoder_reset = 1;
......@@ -870,7 +871,7 @@ static int imc_decode_block(AVCodecContext *avctx, IMCContext *q, int ch)
chctx->decoder_reset = 0;
}
flag = get_bits1(&q->gb);
flag = bitstream_read_bit(&q->bc);
if (stream_format_code & 0x1)
imc_read_level_coeffs_raw(q, stream_format_code, chctx->levlCoeffBuf);
else
......@@ -908,7 +909,7 @@ static int imc_decode_block(AVCodecContext *avctx, IMCContext *q, int ch)
memset(chctx->bandFlagsBuf, 0, BANDS * sizeof(int));
for (i = 0; i < BANDS - 1; i++)
if (chctx->bandWidthT[i])
chctx->bandFlagsBuf[i] = get_bits1(&q->gb);
chctx->bandFlagsBuf[i] = bitstream_read_bit(&q->bc);
imc_calculate_coeffs(q, chctx->flcoeffs1, chctx->flcoeffs2,
chctx->bandWidthT, chctx->flcoeffs3,
......@@ -943,7 +944,7 @@ static int imc_decode_block(AVCodecContext *avctx, IMCContext *q, int ch)
}
if ((ret = bit_allocation(q, chctx, stream_format_code,
512 - bitscount - get_bits_count(&q->gb),
512 - bitscount - bitstream_tell(&q->bc),
flag)) < 0) {
av_log(avctx, AV_LOG_ERROR, "Bit allocations failed\n");
chctx->decoder_reset = 1;
......@@ -1015,7 +1016,7 @@ static int imc_decode_frame(AVCodecContext *avctx, void *data,
q->bdsp.bswap16_buf(buf16, (const uint16_t *) buf, IMC_BLOCK_SIZE / 2);
init_get_bits(&q->gb, (const uint8_t*)buf16, IMC_BLOCK_SIZE * 8);
bitstream_init(&q->bc, (const uint8_t*)buf16, IMC_BLOCK_SIZE * 8);
buf += IMC_BLOCK_SIZE;
......
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