mirror of
https://github.com/mpv-player/mpv
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84b2296c34
Setup default speex modes, allows decoding of speex in flv which does not contain a header packet. git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@33327 b3059339-0415-0410-9bf9-f77b7e298cf2
180 lines
5.7 KiB
C
180 lines
5.7 KiB
C
/*
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* Speex decoder by Reimar Döffinger <Reimar.Doeffinger@stud.uni-karlsruhe.de>
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*
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* This code may be be relicensed under the terms of the GNU LGPL when it
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* becomes part of the FFmpeg project (ffmpeg.org)
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*
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* This file is part of MPlayer.
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*
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* MPlayer is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* MPlayer is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with MPlayer; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include <stdlib.h>
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#include <speex/speex.h>
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#include <speex/speex_stereo.h>
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#include <speex/speex_header.h>
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#include "ad_internal.h"
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static const ad_info_t info = {
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"Speex audio decoder",
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"speex",
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"Reimar Döffinger",
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"",
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""
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};
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LIBAD_EXTERN(speex)
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typedef struct {
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SpeexBits bits;
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void *dec_context;
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SpeexStereoState stereo;
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SpeexHeader *hdr;
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} context_t;
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#define MAX_FRAMES_PER_PACKET 100
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static int preinit(sh_audio_t *sh) {
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sh->audio_out_minsize = 2 * 320 * MAX_FRAMES_PER_PACKET * 2 * sizeof(short);
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return 1;
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}
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static int read_le32(const uint8_t **src) {
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const uint8_t *p = *src;
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*src += 4;
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return p[0] + (p[1] << 8) + (p[2] << 16) + (p[3] << 24);
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}
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static int init(sh_audio_t *sh) {
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context_t *ctx = calloc(1, sizeof(context_t));
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const uint8_t *hdr = (const uint8_t *)(sh->wf + 1);
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const SpeexMode *spx_mode;
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const SpeexStereoState st_st = SPEEX_STEREO_STATE_INIT; // hack
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if (sh->wf && sh->wf->cbSize >= 80)
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ctx->hdr = speex_packet_to_header((char *)&sh->wf[1], sh->wf->cbSize);
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if (!ctx->hdr && sh->wf->cbSize == 0x72 && hdr[0] == 1 && hdr[1] == 0) {
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// speex.acm format: raw SpeexHeader dump
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ctx->hdr = calloc(1, sizeof(*ctx->hdr));
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hdr += 2;
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hdr += 8; // identifier string
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hdr += 20; // version string
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ctx->hdr->speex_version_id = read_le32(&hdr);
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ctx->hdr->header_size = read_le32(&hdr);
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ctx->hdr->rate = read_le32(&hdr);
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ctx->hdr->mode = read_le32(&hdr);
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ctx->hdr->mode_bitstream_version = read_le32(&hdr);
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ctx->hdr->nb_channels = read_le32(&hdr);
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ctx->hdr->bitrate = read_le32(&hdr);
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ctx->hdr->frame_size = read_le32(&hdr);
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ctx->hdr->vbr = read_le32(&hdr);
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ctx->hdr->frames_per_packet = read_le32(&hdr);
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}
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if (!ctx->hdr) {
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mp_msg(MSGT_DECAUDIO, MSGL_ERR, "Invalid or missing extradata! Assuming defaults.\n");
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ctx->hdr = calloc(1, sizeof(*ctx->hdr));
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ctx->hdr->frames_per_packet = 1;
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ctx->hdr->mode = 0;
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if (sh->wf) {
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ctx->hdr->nb_channels = sh->wf->nChannels;
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ctx->hdr->rate = sh->wf->nSamplesPerSec;
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if (ctx->hdr->rate > 16000)
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ctx->hdr->mode = 2;
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else if (ctx->hdr->rate > 8000)
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ctx->hdr->mode = 1;
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}
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}
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if (ctx->hdr->nb_channels != 1 && ctx->hdr->nb_channels != 2) {
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mp_msg(MSGT_DECAUDIO, MSGL_WARN, "Invalid number of channels (%i), "
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"assuming mono\n", ctx->hdr->nb_channels);
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ctx->hdr->nb_channels = 1;
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}
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if (ctx->hdr->frames_per_packet > MAX_FRAMES_PER_PACKET) {
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mp_msg(MSGT_DECAUDIO, MSGL_WARN, "Invalid number of frames per packet (%i), "
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"assuming 1\n", ctx->hdr->frames_per_packet);
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ctx->hdr->frames_per_packet = 1;
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}
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switch (ctx->hdr->mode) {
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case 0:
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spx_mode = &speex_nb_mode; break;
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case 1:
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spx_mode = &speex_wb_mode; break;
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case 2:
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spx_mode = &speex_uwb_mode; break;
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default:
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mp_msg(MSGT_DECAUDIO, MSGL_WARN, "Unknown speex mode (%i)\n", ctx->hdr->mode);
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spx_mode = &speex_nb_mode;
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}
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ctx->dec_context = speex_decoder_init(spx_mode);
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speex_bits_init(&ctx->bits);
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memcpy(&ctx->stereo, &st_st, sizeof(ctx->stereo)); // hack part 2
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sh->channels = ctx->hdr->nb_channels;
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sh->samplerate = ctx->hdr->rate;
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sh->samplesize = 2;
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sh->sample_format = AF_FORMAT_S16_NE;
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sh->context = ctx;
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return 1;
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}
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static void uninit(sh_audio_t *sh) {
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context_t *ctx = sh->context;
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if (ctx) {
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speex_bits_destroy(&ctx->bits);
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speex_decoder_destroy(ctx->dec_context);
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free(ctx->hdr);
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free(ctx);
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}
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ctx = NULL;
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}
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static int decode_audio(sh_audio_t *sh, unsigned char *buf,
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int minlen, int maxlen) {
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double pts;
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context_t *ctx = sh->context;
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int len, framelen, framesamples;
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char *packet;
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int i, err;
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speex_decoder_ctl(ctx->dec_context, SPEEX_GET_FRAME_SIZE, &framesamples);
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framelen = framesamples * ctx->hdr->nb_channels * sizeof(short);
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if (maxlen < ctx->hdr->frames_per_packet * framelen) {
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mp_msg(MSGT_DECAUDIO, MSGL_V, "maxlen too small in decode_audio\n");
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return -1;
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}
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len = ds_get_packet_pts(sh->ds, (unsigned char **)&packet, &pts);
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if (len <= 0) return -1;
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if (sh->pts == MP_NOPTS_VALUE)
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sh->pts = 0;
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if (pts != MP_NOPTS_VALUE) {
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sh->pts = pts;
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sh->pts_bytes = 0;
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}
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speex_bits_read_from(&ctx->bits, packet, len);
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i = ctx->hdr->frames_per_packet;
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do {
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err = speex_decode_int(ctx->dec_context, &ctx->bits, (short *)buf);
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if (err == -2)
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mp_msg(MSGT_DECAUDIO, MSGL_ERR, "Error decoding file.\n");
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if (ctx->hdr->nb_channels == 2)
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speex_decode_stereo_int((short *)buf, framesamples, &ctx->stereo);
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buf = &buf[framelen];
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} while (--i > 0);
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sh->pts_bytes += ctx->hdr->frames_per_packet * framelen;
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return ctx->hdr->frames_per_packet * framelen;
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}
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static int control(sh_audio_t *sh, int cmd, void *arg, ...) {
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return CONTROL_UNKNOWN;
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}
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