64 av_log(avctx,
AV_LOG_ERROR,
"Too big bitrate: reduce sample rate, bitdepth or channels.\n");
101 s->
header[1] = (quant << 6) | (freq << 4) | (avctx->
channels - 1);
117 const int16_t *src16;
127 src16 = (
const int16_t *)frame->
data[0];
135 bytestream2_put_be16(&pb, *src16++);
141 for (
int i = 2;
i;
i--) {
142 bytestream2_put_be16(&pb, src32[0] >> 16);
143 bytestream2_put_be16(&pb, src32[1] >> 16);
144 bytestream2_put_byte(&pb, (*src32++) >> 24);
145 bytestream2_put_byte(&pb, (*src32++) >> 24);
151 bytestream2_put_be16(&pb, src32[0] >> 16);
152 bytestream2_put_be16(&pb, src32[1] >> 16);
153 bytestream2_put_be16(&pb, src32[2] >> 16);
154 bytestream2_put_be16(&pb, src32[3] >> 16);
155 bytestream2_put_byte(&pb, (*src32++) >> 24);
156 bytestream2_put_byte(&pb, (*src32++) >> 24);
157 bytestream2_put_byte(&pb, (*src32++) >> 24);
158 bytestream2_put_byte(&pb, (*src32++) >> 24);
166 avpkt->
size = pkt_size;
182 .supported_samplerates = (
const int[]) { 48000, 96000, 0},
#define AV_CH_LAYOUT_7POINT1
This structure describes decoded (raw) audio or video data.
int64_t bit_rate
the average bitrate
static av_cold int init(AVCodecContext *avctx)
static av_always_inline void bytestream2_init_writer(PutByteContext *p, uint8_t *buf, int buf_size)
#define AV_CH_LAYOUT_STEREO
int block_align
number of bytes per packet if constant and known or 0 Used by some WAV based audio codecs...
int ff_alloc_packet2(AVCodecContext *avctx, AVPacket *avpkt, int64_t size, int64_t min_size)
Check AVPacket size and/or allocate data.
#define FF_CODEC_CAP_INIT_THREADSAFE
The codec does not modify any global variables in the init function, allowing to call the init functi...
enum AVSampleFormat sample_fmt
audio sample format
static av_cold int pcm_dvd_encode_init(AVCodecContext *avctx)
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
static int pcm_dvd_encode_frame(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
#define AV_CH_LAYOUT_5POINT1
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
#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.
#define AV_CODEC_CAP_SMALL_LAST_FRAME
Codec can be fed a final frame with a smaller size.
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
int frame_size
Number of samples per channel in an audio frame.
Libavcodec external API header.
AVSampleFormat
Audio sample formats.
int sample_rate
samples per second
main external API structure.
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
common internal api header.
AVCodec ff_pcm_dvd_encoder
int channels
number of audio channels
Filter the word “frame” indicates either a video frame or a group of audio samples
static av_always_inline int64_t ff_samples_to_time_base(AVCodecContext *avctx, int64_t samples)
Rescale from sample rate to AVCodecContext.time_base.
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
#define AV_CH_LAYOUT_MONO
This structure stores compressed data.
int nb_samples
number of audio samples (per channel) described by this frame
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...