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21 #include <speex/speex.h>
22 #include <speex/speex_header.h>
23 #include <speex/speex_stereo.h>
24 #include <speex/speex_callbacks.h>
67 s->pktsize = ((
const int[]){5,10,15,20,20,28,28,38,38,46,62})[
quality];
77 case 8000: spx_mode = 0;
break;
78 case 16000: spx_mode = 1;
break;
79 case 32000: spx_mode = 2;
break;
83 "Decoding as 32kHz ultra-wideband\n",
89 mode = speex_lib_get_mode(spx_mode);
94 s->frame_size = 160 << spx_mode;
108 speex_bits_init(&
s->bits);
109 s->dec_state = speex_decoder_init(
mode);
118 callback.func = speex_std_stereo_request_handler;
120 s->stereo = (SpeexStereoState)SPEEX_STEREO_STATE_INIT;
121 speex_decoder_ctl(
s->dec_state, SPEEX_SET_HANDLER, &
callback);
128 int *got_frame_ptr,
AVPacket *avpkt)
130 uint8_t *buf = avpkt->
data;
131 int buf_size = avpkt->
size;
134 int ret, consumed = 0;
138 frame->nb_samples =
s->frame_size;
147 if (speex_bits_remaining(&
s->bits) < 5 ||
148 speex_bits_peek_unsigned(&
s->bits, 5) == 0xF) {
150 if (!buf || !buf_size) {
154 if (
s->pktsize && buf_size == 62)
155 buf_size =
s->pktsize;
157 speex_bits_read_from(&
s->bits, buf, buf_size);
158 consumed = avpkt->
size;
162 ret = speex_decode_int(
s->dec_state, &
s->bits,
output);
168 speex_decode_stereo_int(
output,
s->frame_size, &
s->stereo);
173 speex_decoder_ctl(
s->dec_state, SPEEX_GET_BITRATE, &avctx->
bit_rate);
181 speex_bits_destroy(&
s->bits);
182 speex_decoder_destroy(
s->dec_state);
190 speex_bits_reset(&
s->bits);
194 .
p.
name =
"libspeex",
200 AV_CODEC_CAP_SUBFRAMES |
203 .p.wrapper_name =
"libspeex",
static av_cold int libspeex_decode_init(AVCodecContext *avctx)
#define AV_LOG_WARNING
Something somehow does not look correct.
#define AV_CHANNEL_LAYOUT_STEREO
int sample_rate
samples per second
filter_frame For filters that do not use the this method is called when a frame is pushed to the filter s input It can be called at any time except in a reentrant way If the input frame is enough to produce output
This structure describes decoded (raw) audio or video data.
#define FF_CODEC_CAP_NOT_INIT_THREADSAFE
The codec is not known to be init-threadsafe (i.e.
int nb_channels
Number of channels in this layout.
trying all byte sequences megabyte in length and selecting the best looking sequence will yield cases to try But a word about quality
AVCodec p
The public AVCodec.
AVChannelLayout ch_layout
Audio channel layout.
static av_cold void libspeex_decode_flush(AVCodecContext *avctx)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
static int libspeex_decode_frame(AVCodecContext *avctx, AVFrame *frame, int *got_frame_ptr, AVPacket *avpkt)
#define FF_CODEC_DECODE_CB(func)
#define CODEC_LONG_NAME(str)
static void callback(void *priv_data, int index, uint8_t *buf, int buf_size, int64_t time, enum dshowDeviceType devtype)
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
int64_t bit_rate
the average bitrate
#define AV_CODEC_CAP_CHANNEL_CONF
Codec should fill in channel configuration and samplerate instead of container.
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
int(* init)(AVBSFContext *ctx)
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
An AVChannelLayout holds information about the channel layout of audio data.
static av_cold int libspeex_decode_close(AVCodecContext *avctx)
enum AVSampleFormat sample_fmt
audio sample format
const FFCodec ff_libspeex_decoder
static const uint8_t header[24]
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
@ AV_SAMPLE_FMT_S16
signed 16 bits
const char * name
Name of the codec implementation.
#define SPEEX_INBAND_STEREO
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
main external API structure.
void av_channel_layout_uninit(AVChannelLayout *channel_layout)
Free any allocated data in the channel layout and reset the channel count to 0.
#define AV_CODEC_CAP_DELAY
Encoder or decoder requires flushing with NULL input at the end in order to give the complete and cor...
#define AV_CHANNEL_LAYOUT_MONO
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
This structure stores compressed data.
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
#define MKTAG(a, b, c, d)