* http://wiki.multimedia.cx/index.php?title=Bink_Audio
*/
+#include "libavutil/channel_layout.h"
+#include "libavutil/intfloat.h"
+
+#define BITSTREAM_READER_LE
#include "avcodec.h"
-#define ALT_BITSTREAM_READER_LE
-#include "get_bits.h"
-#include "dsputil.h"
+#include "bitstream.h"
#include "dct.h"
+#include "decode.h"
+#include "internal.h"
#include "rdft.h"
-#include "fmtconvert.h"
-#include "libavutil/intfloat_readwrite.h"
-
-extern const uint16_t ff_wma_critical_freqs[25];
+#include "wma_freqs.h"
static float quant_table[96];
#define MAX_CHANNELS 2
#define BINK_BLOCK_MAX_SIZE (MAX_CHANNELS << 11)
-typedef struct {
- GetBitContext gb;
- DSPContext dsp;
- FmtConvertContext fmt_conv;
+typedef struct BinkAudioContext {
+ BitstreamContext bc;
int version_b; ///< Bink version 'b'
int first;
int channels;
unsigned int *bands;
float root;
DECLARE_ALIGNED(32, FFTSample, coeffs)[BINK_BLOCK_MAX_SIZE];
- DECLARE_ALIGNED(16, int16_t, previous)[BINK_BLOCK_MAX_SIZE / 16]; ///< coeffs from previous audio block
- DECLARE_ALIGNED(16, int16_t, current)[BINK_BLOCK_MAX_SIZE / 16];
- float *coeffs_ptr[MAX_CHANNELS]; ///< pointers to the coeffs arrays for float_to_int16_interleave
- float *prev_ptr[MAX_CHANNELS]; ///< pointers to the overlap points in the coeffs array
- uint8_t *packet_buffer;
+ float previous[MAX_CHANNELS][BINK_BLOCK_MAX_SIZE / 16]; ///< coeffs from previous audio block
+ AVPacket *pkt;
union {
RDFTContext rdft;
DCTContext dct;
int i;
int frame_len_bits;
- dsputil_init(&s->dsp, avctx);
- ff_fmt_convert_init(&s->fmt_conv, avctx);
-
/* determine frame length */
if (avctx->sample_rate < 22050) {
frame_len_bits = 9;
av_log(avctx, AV_LOG_ERROR, "too many channels: %d\n", avctx->channels);
return -1;
}
+ avctx->channel_layout = avctx->channels == 1 ? AV_CH_LAYOUT_MONO :
+ AV_CH_LAYOUT_STEREO;
s->version_b = avctx->extradata && avctx->extradata[3] == 'b';
- if (avctx->codec->id == CODEC_ID_BINKAUDIO_RDFT) {
+ if (avctx->codec->id == AV_CODEC_ID_BINKAUDIO_RDFT) {
// audio is already interleaved for the RDFT format variant
+ avctx->sample_fmt = AV_SAMPLE_FMT_FLT;
sample_rate *= avctx->channels;
s->channels = 1;
if (!s->version_b)
frame_len_bits += av_log2(avctx->channels);
} else {
s->channels = avctx->channels;
+ avctx->sample_fmt = AV_SAMPLE_FMT_FLTP;
}
s->frame_len = 1 << frame_len_bits;
s->overlap_len = s->frame_len / 16;
s->block_size = (s->frame_len - s->overlap_len) * s->channels;
sample_rate_half = (sample_rate + 1) / 2;
- s->root = 2.0 / sqrt(s->frame_len);
+ if (avctx->codec->id == AV_CODEC_ID_BINKAUDIO_RDFT)
+ s->root = 2.0 / (sqrt(s->frame_len) * 32768.0);
+ else
+ s->root = s->frame_len / (sqrt(s->frame_len) * 32768.0);
for (i = 0; i < 96; i++) {
/* constant is result of 0.066399999/log10(M_E) */
quant_table[i] = expf(i * 0.15289164787221953823f) * s->root;
s->bands[s->num_bands] = s->frame_len;
s->first = 1;
- avctx->sample_fmt = AV_SAMPLE_FMT_S16;
-
- for (i = 0; i < s->channels; i++) {
- s->coeffs_ptr[i] = s->coeffs + i * s->frame_len;
- s->prev_ptr[i] = s->coeffs_ptr[i] + s->frame_len - s->overlap_len;
- }
- if (CONFIG_BINKAUDIO_RDFT_DECODER && avctx->codec->id == CODEC_ID_BINKAUDIO_RDFT)
+ if (CONFIG_BINKAUDIO_RDFT_DECODER && avctx->codec->id == AV_CODEC_ID_BINKAUDIO_RDFT)
ff_rdft_init(&s->trans.rdft, frame_len_bits, DFT_C2R);
else if (CONFIG_BINKAUDIO_DCT_DECODER)
ff_dct_init(&s->trans.dct, frame_len_bits, DCT_III);
else
return -1;
+ s->pkt = av_packet_alloc();
+ if (!s->pkt)
+ return AVERROR(ENOMEM);
+
return 0;
}
-static float get_float(GetBitContext *gb)
+static float get_float(BitstreamContext *bc)
{
- int power = get_bits(gb, 5);
- float f = ldexpf(get_bits_long(gb, 23), power - 23);
- if (get_bits1(gb))
+ int power = bitstream_read(bc, 5);
+ float f = ldexpf(bitstream_read(bc, 23), power - 23);
+ if (bitstream_read_bit(bc))
f = -f;
return f;
}
2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 13, 14, 15, 16, 32, 64
};
-#define GET_BITS_SAFE(out, nbits) do { \
- if (get_bits_left(gb) < nbits) \
- return AVERROR_INVALIDDATA; \
- out = get_bits(gb, nbits); \
-} while (0)
-
/**
* Decode Bink Audio block
* @param[out] out Output buffer (must contain s->block_size elements)
* @return 0 on success, negative error code on failure
*/
-static int decode_block(BinkAudioContext *s, int16_t *out, int use_dct)
+static int decode_block(BinkAudioContext *s, float **out, int use_dct)
{
int ch, i, j, k;
float q, quant[25];
int width, coeff;
- GetBitContext *gb = &s->gb;
+ BitstreamContext *bc = &s->bc;
if (use_dct)
- skip_bits(gb, 2);
+ bitstream_skip(bc, 2);
for (ch = 0; ch < s->channels; ch++) {
- FFTSample *coeffs = s->coeffs_ptr[ch];
+ FFTSample *coeffs = out[ch];
+
if (s->version_b) {
- if (get_bits_left(gb) < 64)
+ if (bitstream_bits_left(bc) < 64)
return AVERROR_INVALIDDATA;
- coeffs[0] = av_int2flt(get_bits(gb, 32)) * s->root;
- coeffs[1] = av_int2flt(get_bits(gb, 32)) * s->root;
+ coeffs[0] = av_int2float(bitstream_read(bc, 32)) * s->root;
+ coeffs[1] = av_int2float(bitstream_read(bc, 32)) * s->root;
} else {
- if (get_bits_left(gb) < 58)
+ if (bitstream_bits_left(bc) < 58)
return AVERROR_INVALIDDATA;
- coeffs[0] = get_float(gb) * s->root;
- coeffs[1] = get_float(gb) * s->root;
+ coeffs[0] = get_float(bc) * s->root;
+ coeffs[1] = get_float(bc) * s->root;
}
- if (get_bits_left(gb) < s->num_bands * 8)
+ if (bitstream_bits_left(bc) < s->num_bands * 8)
return AVERROR_INVALIDDATA;
for (i = 0; i < s->num_bands; i++) {
- int value = get_bits(gb, 8);
+ int value = bitstream_read(bc, 8);
quant[i] = quant_table[FFMIN(value, 95)];
}
if (s->version_b) {
j = i + 16;
} else {
- int v;
- GET_BITS_SAFE(v, 1);
+ int v = bitstream_read_bit(bc);
if (v) {
- GET_BITS_SAFE(v, 4);
+ v = bitstream_read(bc, 4);
j = i + rle_length_tab[v] * 8;
} else {
j = i + 8;
j = FFMIN(j, s->frame_len);
- GET_BITS_SAFE(width, 4);
+ width = bitstream_read(bc, 4);
if (width == 0) {
memset(coeffs + i, 0, (j - i) * sizeof(*coeffs));
i = j;
while (i < j) {
if (s->bands[k] == i)
q = quant[k++];
- GET_BITS_SAFE(coeff, width);
+ coeff = bitstream_read(bc, width);
if (coeff) {
int v;
- GET_BITS_SAFE(v, 1);
+ v = bitstream_read_bit(bc);
if (v)
coeffs[i] = -q * coeff;
else
if (CONFIG_BINKAUDIO_DCT_DECODER && use_dct) {
coeffs[0] /= 0.5;
s->trans.dct.dct_calc(&s->trans.dct, coeffs);
- s->dsp.vector_fmul_scalar(coeffs, coeffs, s->frame_len / 2, s->frame_len);
}
else if (CONFIG_BINKAUDIO_RDFT_DECODER)
s->trans.rdft.rdft_calc(&s->trans.rdft, coeffs);
}
- s->fmt_conv.float_to_int16_interleave(s->current,
- (const float **)s->prev_ptr,
- s->overlap_len, s->channels);
- s->fmt_conv.float_to_int16_interleave(out, (const float **)s->coeffs_ptr,
- s->frame_len - s->overlap_len,
- s->channels);
-
- if (!s->first) {
+ for (ch = 0; ch < s->channels; ch++) {
+ int j;
int count = s->overlap_len * s->channels;
- int shift = av_log2(count);
- for (i = 0; i < count; i++) {
- out[i] = (s->previous[i] * (count - i) + out[i] * i) >> shift;
+ if (!s->first) {
+ j = ch;
+ for (i = 0; i < s->overlap_len; i++, j += s->channels)
+ out[ch][i] = (s->previous[ch][i] * (count - j) +
+ out[ch][i] * j) / count;
}
+ memcpy(s->previous[ch], &out[ch][s->frame_len - s->overlap_len],
+ s->overlap_len * sizeof(*s->previous[ch]));
}
- memcpy(s->previous, s->current,
- s->overlap_len * s->channels * sizeof(*s->previous));
-
s->first = 0;
return 0;
{
BinkAudioContext * s = avctx->priv_data;
av_freep(&s->bands);
- av_freep(&s->packet_buffer);
- if (CONFIG_BINKAUDIO_RDFT_DECODER && avctx->codec->id == CODEC_ID_BINKAUDIO_RDFT)
+ if (CONFIG_BINKAUDIO_RDFT_DECODER && avctx->codec->id == AV_CODEC_ID_BINKAUDIO_RDFT)
ff_rdft_end(&s->trans.rdft);
else if (CONFIG_BINKAUDIO_DCT_DECODER)
ff_dct_end(&s->trans.dct);
+
+ av_packet_free(&s->pkt);
+
return 0;
}
-static void get_bits_align32(GetBitContext *s)
+static void get_bits_align32(BitstreamContext *s)
{
- int n = (-get_bits_count(s)) & 31;
- if (n) skip_bits(s, n);
+ int n = (-bitstream_tell(s)) & 31;
+ if (n)
+ bitstream_skip(s, n);
}
-static int decode_frame(AVCodecContext *avctx,
- void *data, int *data_size,
- AVPacket *avpkt)
+static int binkaudio_receive_frame(AVCodecContext *avctx, AVFrame *frame)
{
BinkAudioContext *s = avctx->priv_data;
- int16_t *samples = data;
- GetBitContext *gb = &s->gb;
- int out_size, consumed = 0;
-
- if (!get_bits_left(gb)) {
- uint8_t *buf;
- /* handle end-of-stream */
- if (!avpkt->size) {
- *data_size = 0;
- return 0;
- }
- if (avpkt->size < 4) {
+ BitstreamContext *bc = &s->bc;
+ int ret;
+
+ if (!s->pkt->data) {
+ ret = ff_decode_get_packet(avctx, s->pkt);
+ if (ret < 0)
+ return ret;
+
+ if (s->pkt->size < 4) {
av_log(avctx, AV_LOG_ERROR, "Packet is too small\n");
- return AVERROR_INVALIDDATA;
+ ret = AVERROR_INVALIDDATA;
+ goto fail;
}
- buf = av_realloc(s->packet_buffer, avpkt->size + FF_INPUT_BUFFER_PADDING_SIZE);
- if (!buf)
- return AVERROR(ENOMEM);
- s->packet_buffer = buf;
- memcpy(s->packet_buffer, avpkt->data, avpkt->size);
- init_get_bits(gb, s->packet_buffer, avpkt->size * 8);
- consumed = avpkt->size;
+
+ ret = bitstream_init8(bc, s->pkt->data, s->pkt->size);
+ if (ret < 0)
+ goto fail;
/* skip reported size */
- skip_bits_long(gb, 32);
+ bitstream_skip(bc, 32);
}
- out_size = s->block_size * av_get_bytes_per_sample(avctx->sample_fmt);
- if (*data_size < out_size) {
- av_log(avctx, AV_LOG_ERROR, "Output buffer is too small\n");
- return AVERROR(EINVAL);
+ /* get output buffer */
+ frame->nb_samples = s->frame_len;
+ if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+ return ret;
}
- if (decode_block(s, samples, avctx->codec->id == CODEC_ID_BINKAUDIO_DCT)) {
+ if (decode_block(s, (float **)frame->extended_data,
+ avctx->codec->id == AV_CODEC_ID_BINKAUDIO_DCT)) {
av_log(avctx, AV_LOG_ERROR, "Incomplete packet\n");
return AVERROR_INVALIDDATA;
}
- get_bits_align32(gb);
+ get_bits_align32(bc);
+ if (!bitstream_bits_left(bc)) {
+ memset(bc, 0, sizeof(*bc));
+ av_packet_unref(s->pkt);
+ }
- *data_size = out_size;
- return consumed;
+ frame->nb_samples = s->block_size / avctx->channels;
+
+ return 0;
+fail:
+ av_packet_unref(s->pkt);
+ return ret;
}
AVCodec ff_binkaudio_rdft_decoder = {
.name = "binkaudio_rdft",
+ .long_name = NULL_IF_CONFIG_SMALL("Bink Audio (RDFT)"),
.type = AVMEDIA_TYPE_AUDIO,
- .id = CODEC_ID_BINKAUDIO_RDFT,
+ .id = AV_CODEC_ID_BINKAUDIO_RDFT,
.priv_data_size = sizeof(BinkAudioContext),
.init = decode_init,
.close = decode_end,
- .decode = decode_frame,
- .capabilities = CODEC_CAP_DELAY,
- .long_name = NULL_IF_CONFIG_SMALL("Bink Audio (RDFT)")
+ .receive_frame = binkaudio_receive_frame,
+ .capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_DR1,
};
AVCodec ff_binkaudio_dct_decoder = {
.name = "binkaudio_dct",
+ .long_name = NULL_IF_CONFIG_SMALL("Bink Audio (DCT)"),
.type = AVMEDIA_TYPE_AUDIO,
- .id = CODEC_ID_BINKAUDIO_DCT,
+ .id = AV_CODEC_ID_BINKAUDIO_DCT,
.priv_data_size = sizeof(BinkAudioContext),
.init = decode_init,
.close = decode_end,
- .decode = decode_frame,
- .capabilities = CODEC_CAP_DELAY,
- .long_name = NULL_IF_CONFIG_SMALL("Bink Audio (DCT)")
+ .receive_frame = binkaudio_receive_frame,
+ .capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_DR1,
};
projects / ffmpeg / blobdiff