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Diffstat (limited to 'ffmpeg1/libavcodec/wmaenc.c')
-rw-r--r--ffmpeg1/libavcodec/wmaenc.c421
1 files changed, 0 insertions, 421 deletions
diff --git a/ffmpeg1/libavcodec/wmaenc.c b/ffmpeg1/libavcodec/wmaenc.c
deleted file mode 100644
index 799535e..0000000
--- a/ffmpeg1/libavcodec/wmaenc.c
+++ /dev/null
@@ -1,421 +0,0 @@
-/*
- * WMA compatible encoder
- * Copyright (c) 2007 Michael Niedermayer
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * FFmpeg is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include "avcodec.h"
-#include "internal.h"
-#include "wma.h"
-#include "libavutil/avassert.h"
-
-
-static int encode_init(AVCodecContext * avctx){
- WMACodecContext *s = avctx->priv_data;
- int i, flags1, flags2, block_align;
- uint8_t *extradata;
-
- s->avctx = avctx;
-
- if(avctx->channels > MAX_CHANNELS) {
- av_log(avctx, AV_LOG_ERROR, "too many channels: got %i, need %i or fewer\n",
- avctx->channels, MAX_CHANNELS);
- return AVERROR(EINVAL);
- }
-
- if (avctx->sample_rate > 48000) {
- av_log(avctx, AV_LOG_ERROR, "sample rate is too high: %d > 48kHz\n",
- avctx->sample_rate);
- return AVERROR(EINVAL);
- }
-
- if(avctx->bit_rate < 24*1000) {
- av_log(avctx, AV_LOG_ERROR, "bitrate too low: got %i, need 24000 or higher\n",
- avctx->bit_rate);
- return AVERROR(EINVAL);
- }
-
- /* extract flag infos */
- flags1 = 0;
- flags2 = 1;
- if (avctx->codec->id == AV_CODEC_ID_WMAV1) {
- extradata= av_malloc(4);
- avctx->extradata_size= 4;
- AV_WL16(extradata, flags1);
- AV_WL16(extradata+2, flags2);
- } else if (avctx->codec->id == AV_CODEC_ID_WMAV2) {
- extradata= av_mallocz(10);
- avctx->extradata_size= 10;
- AV_WL32(extradata, flags1);
- AV_WL16(extradata+4, flags2);
- }else
- av_assert0(0);
- avctx->extradata= extradata;
- s->use_exp_vlc = flags2 & 0x0001;
- s->use_bit_reservoir = flags2 & 0x0002;
- s->use_variable_block_len = flags2 & 0x0004;
- if (avctx->channels == 2)
- s->ms_stereo = 1;
-
- ff_wma_init(avctx, flags2);
-
- /* init MDCT */
- for(i = 0; i < s->nb_block_sizes; i++)
- ff_mdct_init(&s->mdct_ctx[i], s->frame_len_bits - i + 1, 0, 1.0);
-
- block_align = avctx->bit_rate * (int64_t)s->frame_len /
- (avctx->sample_rate * 8);
- block_align = FFMIN(block_align, MAX_CODED_SUPERFRAME_SIZE);
- avctx->block_align = block_align;
-
- avctx->frame_size = avctx->delay = s->frame_len;
-
- return 0;
-}
-
-
-static void apply_window_and_mdct(AVCodecContext * avctx, const AVFrame *frame)
-{
- WMACodecContext *s = avctx->priv_data;
- float **audio = (float **)frame->extended_data;
- int len = frame->nb_samples;
- int window_index= s->frame_len_bits - s->block_len_bits;
- FFTContext *mdct = &s->mdct_ctx[window_index];
- int ch;
- const float * win = s->windows[window_index];
- int window_len = 1 << s->block_len_bits;
- float n = 2.0 * 32768.0 / window_len;
-
- for (ch = 0; ch < avctx->channels; ch++) {
- memcpy(s->output, s->frame_out[ch], window_len * sizeof(*s->output));
- s->fdsp.vector_fmul_scalar(s->frame_out[ch], audio[ch], n, len);
- s->fdsp.vector_fmul_reverse(&s->output[window_len], s->frame_out[ch], win, len);
- s->fdsp.vector_fmul(s->frame_out[ch], s->frame_out[ch], win, len);
- mdct->mdct_calc(mdct, s->coefs[ch], s->output);
- }
-}
-
-//FIXME use for decoding too
-static void init_exp(WMACodecContext *s, int ch, const int *exp_param){
- int n;
- const uint16_t *ptr;
- float v, *q, max_scale, *q_end;
-
- ptr = s->exponent_bands[s->frame_len_bits - s->block_len_bits];
- q = s->exponents[ch];
- q_end = q + s->block_len;
- max_scale = 0;
- while (q < q_end) {
- /* XXX: use a table */
- v = pow(10, *exp_param++ * (1.0 / 16.0));
- max_scale= FFMAX(max_scale, v);
- n = *ptr++;
- do {
- *q++ = v;
- } while (--n);
- }
- s->max_exponent[ch] = max_scale;
-}
-
-static void encode_exp_vlc(WMACodecContext *s, int ch, const int *exp_param){
- int last_exp;
- const uint16_t *ptr;
- float *q, *q_end;
-
- ptr = s->exponent_bands[s->frame_len_bits - s->block_len_bits];
- q = s->exponents[ch];
- q_end = q + s->block_len;
- if (s->version == 1) {
- last_exp= *exp_param++;
- av_assert0(last_exp-10 >= 0 && last_exp-10 < 32);
- put_bits(&s->pb, 5, last_exp - 10);
- q+= *ptr++;
- }else
- last_exp = 36;
- while (q < q_end) {
- int exp = *exp_param++;
- int code = exp - last_exp + 60;
- av_assert1(code >= 0 && code < 120);
- put_bits(&s->pb, ff_aac_scalefactor_bits[code], ff_aac_scalefactor_code[code]);
- /* XXX: use a table */
- q+= *ptr++;
- last_exp= exp;
- }
-}
-
-static int encode_block(WMACodecContext *s, float (*src_coefs)[BLOCK_MAX_SIZE], int total_gain){
- int v, bsize, ch, coef_nb_bits, parse_exponents;
- float mdct_norm;
- int nb_coefs[MAX_CHANNELS];
- static const int fixed_exp[25]={20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20};
-
- //FIXME remove duplication relative to decoder
- if (s->use_variable_block_len) {
- av_assert0(0); //FIXME not implemented
- }else{
- /* fixed block len */
- s->next_block_len_bits = s->frame_len_bits;
- s->prev_block_len_bits = s->frame_len_bits;
- s->block_len_bits = s->frame_len_bits;
- }
-
- s->block_len = 1 << s->block_len_bits;
-// assert((s->block_pos + s->block_len) <= s->frame_len);
- bsize = s->frame_len_bits - s->block_len_bits;
-
- //FIXME factor
- v = s->coefs_end[bsize] - s->coefs_start;
- for (ch = 0; ch < s->avctx->channels; ch++)
- nb_coefs[ch] = v;
- {
- int n4 = s->block_len / 2;
- mdct_norm = 1.0 / (float)n4;
- if (s->version == 1) {
- mdct_norm *= sqrt(n4);
- }
- }
-
- if (s->avctx->channels == 2) {
- put_bits(&s->pb, 1, !!s->ms_stereo);
- }
-
- for (ch = 0; ch < s->avctx->channels; ch++) {
- s->channel_coded[ch] = 1; //FIXME only set channel_coded when needed, instead of always
- if (s->channel_coded[ch]) {
- init_exp(s, ch, fixed_exp);
- }
- }
-
- for (ch = 0; ch < s->avctx->channels; ch++) {
- if (s->channel_coded[ch]) {
- WMACoef *coefs1;
- float *coefs, *exponents, mult;
- int i, n;
-
- coefs1 = s->coefs1[ch];
- exponents = s->exponents[ch];
- mult = pow(10, total_gain * 0.05) / s->max_exponent[ch];
- mult *= mdct_norm;
- coefs = src_coefs[ch];
- if (s->use_noise_coding && 0) {
- av_assert0(0); //FIXME not implemented
- } else {
- coefs += s->coefs_start;
- n = nb_coefs[ch];
- for(i = 0;i < n; i++){
- double t= *coefs++ / (exponents[i] * mult);
- if(t<-32768 || t>32767)
- return -1;
-
- coefs1[i] = lrint(t);
- }
- }
- }
- }
-
- v = 0;
- for (ch = 0; ch < s->avctx->channels; ch++) {
- int a = s->channel_coded[ch];
- put_bits(&s->pb, 1, a);
- v |= a;
- }
-
- if (!v)
- return 1;
-
- for(v= total_gain-1; v>=127; v-= 127)
- put_bits(&s->pb, 7, 127);
- put_bits(&s->pb, 7, v);
-
- coef_nb_bits= ff_wma_total_gain_to_bits(total_gain);
-
- if (s->use_noise_coding) {
- for (ch = 0; ch < s->avctx->channels; ch++) {
- if (s->channel_coded[ch]) {
- int i, n;
- n = s->exponent_high_sizes[bsize];
- for(i=0;i<n;i++) {
- put_bits(&s->pb, 1, s->high_band_coded[ch][i]= 0);
- if (0)
- nb_coefs[ch] -= s->exponent_high_bands[bsize][i];
- }
- }
- }
- }
-
- parse_exponents = 1;
- if (s->block_len_bits != s->frame_len_bits) {
- put_bits(&s->pb, 1, parse_exponents);
- }
-
- if (parse_exponents) {
- for (ch = 0; ch < s->avctx->channels; ch++) {
- if (s->channel_coded[ch]) {
- if (s->use_exp_vlc) {
- encode_exp_vlc(s, ch, fixed_exp);
- } else {
- av_assert0(0); //FIXME not implemented
-// encode_exp_lsp(s, ch);
- }
- }
- }
- } else {
- av_assert0(0); //FIXME not implemented
- }
-
- for (ch = 0; ch < s->avctx->channels; ch++) {
- if (s->channel_coded[ch]) {
- int run, tindex;
- WMACoef *ptr, *eptr;
- tindex = (ch == 1 && s->ms_stereo);
- ptr = &s->coefs1[ch][0];
- eptr = ptr + nb_coefs[ch];
-
- run=0;
- for(;ptr < eptr; ptr++){
- if(*ptr){
- int level= *ptr;
- int abs_level= FFABS(level);
- int code= 0;
- if(abs_level <= s->coef_vlcs[tindex]->max_level){
- if(run < s->coef_vlcs[tindex]->levels[abs_level-1])
- code= run + s->int_table[tindex][abs_level-1];
- }
-
- av_assert2(code < s->coef_vlcs[tindex]->n);
- put_bits(&s->pb, s->coef_vlcs[tindex]->huffbits[code], s->coef_vlcs[tindex]->huffcodes[code]);
-
- if(code == 0){
- if(1<<coef_nb_bits <= abs_level)
- return -1;
-
- put_bits(&s->pb, coef_nb_bits, abs_level);
- put_bits(&s->pb, s->frame_len_bits, run);
- }
- put_bits(&s->pb, 1, level < 0); //FIXME the sign is fliped somewhere
- run=0;
- }else{
- run++;
- }
- }
- if(run)
- put_bits(&s->pb, s->coef_vlcs[tindex]->huffbits[1], s->coef_vlcs[tindex]->huffcodes[1]);
- }
- if (s->version == 1 && s->avctx->channels >= 2) {
- avpriv_align_put_bits(&s->pb);
- }
- }
- return 0;
-}
-
-static int encode_frame(WMACodecContext *s, float (*src_coefs)[BLOCK_MAX_SIZE], uint8_t *buf, int buf_size, int total_gain){
- init_put_bits(&s->pb, buf, buf_size);
-
- if (s->use_bit_reservoir) {
- av_assert0(0);//FIXME not implemented
- }else{
- if(encode_block(s, src_coefs, total_gain) < 0)
- return INT_MAX;
- }
-
- avpriv_align_put_bits(&s->pb);
-
- return put_bits_count(&s->pb) / 8 - s->avctx->block_align;
-}
-
-static int encode_superframe(AVCodecContext *avctx, AVPacket *avpkt,
- const AVFrame *frame, int *got_packet_ptr)
-{
- WMACodecContext *s = avctx->priv_data;
- int i, total_gain, ret, error;
-
- s->block_len_bits= s->frame_len_bits; //required by non variable block len
- s->block_len = 1 << s->block_len_bits;
-
- apply_window_and_mdct(avctx, frame);
-
- if (s->ms_stereo) {
- float a, b;
- int i;
-
- for(i = 0; i < s->block_len; i++) {
- a = s->coefs[0][i]*0.5;
- b = s->coefs[1][i]*0.5;
- s->coefs[0][i] = a + b;
- s->coefs[1][i] = a - b;
- }
- }
-
- if ((ret = ff_alloc_packet2(avctx, avpkt, 2 * MAX_CODED_SUPERFRAME_SIZE)) < 0)
- return ret;
-
- total_gain= 128;
- for(i=64; i; i>>=1){
- error = encode_frame(s, s->coefs, avpkt->data, avpkt->size,
- total_gain - i);
- if(error<=0)
- total_gain-= i;
- }
-
- while(total_gain <= 128 && error > 0)
- error = encode_frame(s, s->coefs, avpkt->data, avpkt->size, total_gain++);
- av_assert0((put_bits_count(&s->pb) & 7) == 0);
- i= avctx->block_align - (put_bits_count(&s->pb)+7)/8;
- av_assert0(i>=0);
- while(i--)
- put_bits(&s->pb, 8, 'N');
-
- flush_put_bits(&s->pb);
- av_assert0(put_bits_ptr(&s->pb) - s->pb.buf == avctx->block_align);
-
- if (frame->pts != AV_NOPTS_VALUE)
- avpkt->pts = frame->pts - ff_samples_to_time_base(avctx, avctx->delay);
-
- avpkt->size = avctx->block_align;
- *got_packet_ptr = 1;
- return 0;
-}
-
-#if CONFIG_WMAV1_ENCODER
-AVCodec ff_wmav1_encoder = {
- .name = "wmav1",
- .type = AVMEDIA_TYPE_AUDIO,
- .id = AV_CODEC_ID_WMAV1,
- .priv_data_size = sizeof(WMACodecContext),
- .init = encode_init,
- .encode2 = encode_superframe,
- .close = ff_wma_end,
- .sample_fmts = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_FLTP,
- AV_SAMPLE_FMT_NONE },
- .long_name = NULL_IF_CONFIG_SMALL("Windows Media Audio 1"),
-};
-#endif
-#if CONFIG_WMAV2_ENCODER
-AVCodec ff_wmav2_encoder = {
- .name = "wmav2",
- .type = AVMEDIA_TYPE_AUDIO,
- .id = AV_CODEC_ID_WMAV2,
- .priv_data_size = sizeof(WMACodecContext),
- .init = encode_init,
- .encode2 = encode_superframe,
- .close = ff_wma_end,
- .sample_fmts = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_FLTP,
- AV_SAMPLE_FMT_NONE },
- .long_name = NULL_IF_CONFIG_SMALL("Windows Media Audio 2"),
-};
-#endif
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