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https://gitee.com/openharmony/third_party_ffmpeg
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binkaudio: Convert to the new bitstream reader
Signed-off-by: Anton Khirnov <anton@khirnov.net>
This commit is contained in:
Alexandra Hájková
Anton Khirnov
parent
9a23b59943
commit
0977a7c2f6
@ -33,8 +33,8 @@
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#define BITSTREAM_READER_LE
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#include "avcodec.h"
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#include "bitstream.h"
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#include "dct.h"
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#include "get_bits.h"
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#include "internal.h"
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#include "rdft.h"
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#include "wma_freqs.h"
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@ -45,7 +45,7 @@ static float quant_table[96];
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#define BINK_BLOCK_MAX_SIZE (MAX_CHANNELS << 11)
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typedef struct BinkAudioContext {
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GetBitContext gb;
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BitstreamContext bc;
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int version_b; ///< Bink version 'b'
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int first;
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int channels;
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@ -143,11 +143,11 @@ static av_cold int decode_init(AVCodecContext *avctx)
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return 0;
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}
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static float get_float(GetBitContext *gb)
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static float get_float(BitstreamContext *bc)
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{
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int power = get_bits(gb, 5);
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float f = ldexpf(get_bits_long(gb, 23), power - 23);
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if (get_bits1(gb))
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int power = bitstream_read(bc, 5);
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float f = ldexpf(bitstream_read(bc, 23), power - 23);
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if (bitstream_read_bit(bc))
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f = -f;
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return f;
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}
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@ -166,30 +166,30 @@ static int decode_block(BinkAudioContext *s, float **out, int use_dct)
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int ch, i, j, k;
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float q, quant[25];
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int width, coeff;
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GetBitContext *gb = &s->gb;
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BitstreamContext *bc = &s->bc;
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if (use_dct)
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skip_bits(gb, 2);
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bitstream_skip(bc, 2);
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for (ch = 0; ch < s->channels; ch++) {
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FFTSample *coeffs = out[ch];
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if (s->version_b) {
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if (get_bits_left(gb) < 64)
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if (bitstream_bits_left(bc) < 64)
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return AVERROR_INVALIDDATA;
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coeffs[0] = av_int2float(get_bits_long(gb, 32)) * s->root;
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coeffs[1] = av_int2float(get_bits_long(gb, 32)) * s->root;
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coeffs[0] = av_int2float(bitstream_read(bc, 32)) * s->root;
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coeffs[1] = av_int2float(bitstream_read(bc, 32)) * s->root;
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} else {
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if (get_bits_left(gb) < 58)
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if (bitstream_bits_left(bc) < 58)
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return AVERROR_INVALIDDATA;
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coeffs[0] = get_float(gb) * s->root;
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coeffs[1] = get_float(gb) * s->root;
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coeffs[0] = get_float(bc) * s->root;
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coeffs[1] = get_float(bc) * s->root;
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}
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if (get_bits_left(gb) < s->num_bands * 8)
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if (bitstream_bits_left(bc) < s->num_bands * 8)
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return AVERROR_INVALIDDATA;
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for (i = 0; i < s->num_bands; i++) {
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int value = get_bits(gb, 8);
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int value = bitstream_read(bc, 8);
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quant[i] = quant_table[FFMIN(value, 95)];
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}
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@ -202,9 +202,9 @@ static int decode_block(BinkAudioContext *s, float **out, int use_dct)
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if (s->version_b) {
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j = i + 16;
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} else {
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int v = get_bits1(gb);
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int v = bitstream_read_bit(bc);
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if (v) {
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v = get_bits(gb, 4);
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v = bitstream_read(bc, 4);
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j = i + rle_length_tab[v] * 8;
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} else {
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j = i + 8;
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@ -213,7 +213,7 @@ static int decode_block(BinkAudioContext *s, float **out, int use_dct)
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j = FFMIN(j, s->frame_len);
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width = get_bits(gb, 4);
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width = bitstream_read(bc, 4);
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if (width == 0) {
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memset(coeffs + i, 0, (j - i) * sizeof(*coeffs));
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i = j;
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@ -223,10 +223,10 @@ static int decode_block(BinkAudioContext *s, float **out, int use_dct)
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while (i < j) {
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if (s->bands[k] == i)
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q = quant[k++];
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coeff = get_bits(gb, width);
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coeff = bitstream_read(bc, width);
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if (coeff) {
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int v;
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v = get_bits1(gb);
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v = bitstream_read_bit(bc);
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if (v)
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coeffs[i] = -q * coeff;
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else
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@ -278,10 +278,11 @@ static av_cold int decode_end(AVCodecContext *avctx)
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return 0;
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}
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static void get_bits_align32(GetBitContext *s)
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static void get_bits_align32(BitstreamContext *s)
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{
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int n = (-get_bits_count(s)) & 31;
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if (n) skip_bits(s, n);
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int n = (-bitstream_tell(s)) & 31;
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if (n)
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bitstream_skip(s, n);
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}
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static int decode_frame(AVCodecContext *avctx, void *data,
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@ -289,10 +290,10 @@ static int decode_frame(AVCodecContext *avctx, void *data,
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{
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BinkAudioContext *s = avctx->priv_data;
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AVFrame *frame = data;
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GetBitContext *gb = &s->gb;
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BitstreamContext *bc = &s->bc;
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int ret, consumed = 0;
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if (!get_bits_left(gb)) {
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if (!bitstream_bits_left(bc)) {
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uint8_t *buf;
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/* handle end-of-stream */
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if (!avpkt->size) {
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@ -308,11 +309,11 @@ static int decode_frame(AVCodecContext *avctx, void *data,
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return AVERROR(ENOMEM);
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s->packet_buffer = buf;
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memcpy(s->packet_buffer, avpkt->data, avpkt->size);
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init_get_bits(gb, s->packet_buffer, avpkt->size * 8);
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bitstream_init(bc, s->packet_buffer, avpkt->size * 8);
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consumed = avpkt->size;
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/* skip reported size */
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skip_bits_long(gb, 32);
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bitstream_skip(bc, 32);
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}
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/* get output buffer */
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@ -327,7 +328,7 @@ static int decode_frame(AVCodecContext *avctx, void *data,
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av_log(avctx, AV_LOG_ERROR, "Incomplete packet\n");
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return AVERROR_INVALIDDATA;
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}
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get_bits_align32(gb);
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get_bits_align32(bc);
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frame->nb_samples = s->block_size / avctx->channels;
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*got_frame_ptr = 1;
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