23 #include <opus_multistream.h> 43 #ifdef OPUS_SET_PHASE_INVERSION_DISABLED_REQUEST 48 #define OPUS_HEAD_SIZE 19 53 int ret, channel_map = 0, gain_db = 0,
nb_streams, nb_coupled;
54 uint8_t mapping_arr[8] = { 0, 1 }, *mapping;
59 "Invalid number of channels %d, defaulting to stereo\n", avc->
channels);
81 if (avc->
channels > 2 || channel_map) {
83 "No channel mapping for %d channels.\n", avc->
channels);
88 mapping = mapping_arr;
96 for (ch = 0; ch < avc->
channels; ch++)
97 mapping_arr[ch] = mapping[vorbis_offset[ch]];
98 mapping = mapping_arr;
111 ret = opus_multistream_decoder_ctl(opus->
dec, OPUS_SET_GAIN(gain_db));
117 double gain_lin =
ff_exp10(gain_db / (20.0 * 256));
119 opus->
gain.
d = gain_lin;
121 opus->
gain.
i =
FFMIN(gain_lin * 65536, INT_MAX);
125 #ifdef OPUS_SET_PHASE_INVERSION_DISABLED_REQUEST 126 ret = opus_multistream_decoder_ctl(opus->
dec,
127 OPUS_SET_PHASE_INVERSION_DISABLED(!opus->apply_phase_inv));
130 "Unable to set phase inversion: %s\n",
145 opus_multistream_decoder_destroy(opus->
dec);
151 #define MAX_FRAME_SIZE (960 * 6) 165 nb_samples = opus_multistream_decode(opus->
dec, pkt->
data, pkt->
size,
166 (opus_int16 *)frame->
data[0],
169 nb_samples = opus_multistream_decode_float(opus->
dec, pkt->
data, pkt->
size,
170 (
float *)frame->
data[0],
173 if (nb_samples < 0) {
175 opus_strerror(nb_samples));
179 #ifndef OPUS_SET_GAIN 183 float *pcm = (
float *)frame->
data[0];
184 for (; i > 0; i--, pcm++)
187 int16_t *pcm = (int16_t *)frame->
data[0];
188 for (; i > 0; i--, pcm++)
204 opus_multistream_decoder_ctl(opus->
dec, OPUS_RESET_STATE);
211 #define OFFSET(x) offsetof(struct libopus_context, x) 212 #define FLAGS AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_DECODING_PARAM 214 #ifdef OPUS_SET_PHASE_INVERSION_DISABLED_REQUEST 215 {
"apply_phase_inv",
"Apply intensity stereo phase inversion",
OFFSET(apply_phase_inv),
AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1,
FLAGS },
244 .wrapper_name =
"libopus",
#define FF_CODEC_CAP_INIT_CLEANUP
The codec allows calling the close function for deallocation even if the init function returned a fai...
static int libopus_decode(AVCodecContext *avc, void *data, int *got_frame_ptr, AVPacket *pkt)
This structure describes decoded (raw) audio or video data.
ptrdiff_t const GLvoid * data
#define AV_LOG_WARNING
Something somehow does not look correct.
#define LIBAVUTIL_VERSION_INT
const char * av_default_item_name(void *ptr)
Return the context name.
#define AV_CODEC_CAP_CHANNEL_CONF
Codec should fill in channel configuration and samplerate instead of container.
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
AVCodec ff_libopus_decoder
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
int ff_opus_error_to_averror(int err)
enum AVSampleFormat sample_fmt
audio sample format
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
static av_always_inline double ff_exp10(double x)
Compute 10^x for floating point values.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
enum AVSampleFormat request_sample_fmt
desired sample format
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
const char * name
Name of the codec implementation.
uint64_t channel_layout
Audio channel layout.
common internal API header
union libopus_context::@82 gain
static av_cold int libopus_decode_init(AVCodecContext *avc)
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
Libavcodec external API header.
AVSampleFormat
Audio sample formats.
int sample_rate
samples per second
main external API structure.
const uint64_t ff_vorbis_channel_layouts[9]
static void libopus_flush(AVCodecContext *avc)
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Describe the class of an AVClass context structure.
static const AVClass libopusdec_class
int skip_samples
Number of audio samples to skip at the start of the next decoded frame.
static av_const int sign_extend(int val, unsigned bits)
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
internal math functions header
common internal api header.
static const AVOption libopusdec_options[]
int channels
number of audio channels
struct AVCodecInternal * internal
Private context used for internal data.
static av_cold int libopus_decode_close(AVCodecContext *avc)
const uint8_t ff_vorbis_channel_layout_offsets[8][8]
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
This structure stores compressed data.
int nb_samples
number of audio samples (per channel) described by this frame
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators...