30 #define AES3_HEADER_LEN 4 58 frame_size = (h >> 16) & 0xffff;
59 channels = ((h >> 14) & 0x0003) * 2 + 2;
60 bits = ((h >> 4) & 0x0003) * 4 + 16;
98 int buf_size = avpkt->
size;
101 int non_pcm_data_type = -1;
121 uint32_t *o = (uint32_t *)frame->
data[0];
122 for (; buf_size > 6; buf_size -= 7) {
126 *o++ = ((unsigned)
ff_reverse[buf[6] & 0xf0] << 28) |
132 o = (uint32_t *)frame->
data[0];
134 for (i=0; i<frame->
nb_samples * 2 - 6; i+=2) {
135 if (o[i] || o[i+1] || o[i+2] || o[i+3])
137 if (o[i+4] == 0x96F87200U && o[i+5] == 0xA54E1F00) {
138 non_pcm_data_type = (o[i+6] >> 16) & 0x1F;
143 uint32_t *o = (uint32_t *)frame->
data[0];
144 for (; buf_size > 5; buf_size -= 6) {
145 *o++ = ((unsigned)
ff_reverse[buf[2] & 0xf0] << 28) |
148 *o++ = ((unsigned)
ff_reverse[buf[5] & 0xf0] << 28) |
153 o = (uint32_t *)frame->
data[0];
155 for (i=0; i<frame->
nb_samples * 2 - 6; i+=2) {
156 if (o[i] || o[i+1] || o[i+2] || o[i+3])
158 if (o[i+4] == 0x6F872000U && o[i+5] == 0x54E1F000) {
159 non_pcm_data_type = (o[i+6] >> 16) & 0x1F;
164 uint16_t *o = (uint16_t *)frame->
data[0];
165 for (; buf_size > 4; buf_size -= 5) {
173 o = (uint16_t *)frame->
data[0];
175 for (i=0; i<frame->
nb_samples * 2 - 6; i+=2) {
176 if (o[i] || o[i+1] || o[i+2] || o[i+3])
178 if (o[i+4] == 0xF872U && o[i+5] == 0x4E1F) {
179 non_pcm_data_type = (o[i+6] & 0x1F);
185 if (non_pcm_data_type != -1) {
188 "S302 non PCM mode with data type %d not supported\n",
204 #define FLAGS AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_DECODING_PARAM 206 {
"non_pcm_mode",
"Chooses what to do with NON-PCM", offsetof(
S302Context,
non_pcm_mode),
AV_OPT_TYPE_INT, {.i64 = 3}, 0, 3,
FLAGS,
"non_pcm_mode"},
207 {
"copy" ,
"Pass NON-PCM through unchanged" , 0,
AV_OPT_TYPE_CONST, {.i64 = 0}, 0, 3,
FLAGS,
"non_pcm_mode"},
209 {
"decode_copy" ,
"Decode if possible else passthrough", 0,
AV_OPT_TYPE_CONST, {.i64 = 2}, 0, 3,
FLAGS,
"non_pcm_mode"},
210 {
"decode_drop" ,
"Decode if possible else drop" , 0,
AV_OPT_TYPE_CONST, {.i64 = 3}, 0, 3,
FLAGS,
"non_pcm_mode"},
230 .priv_class = &s302m_class,
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
This structure describes decoded (raw) audio or video data.
ptrdiff_t const GLvoid * data
int64_t bit_rate
the average bitrate
#define LIBAVUTIL_VERSION_INT
static int s302m_parse_frame_header(AVCodecContext *avctx, const uint8_t *buf, int buf_size)
const uint8_t ff_reverse[256]
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.
static const AVOption s302m_options[]
#define AV_CH_LAYOUT_STEREO
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
enum AVSampleFormat sample_fmt
audio sample format
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
#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. ...
#define AV_CH_LAYOUT_QUAD
const char * name
Name of the codec implementation.
uint64_t channel_layout
Audio channel layout.
static const AVClass s302m_class
#define AV_CH_LAYOUT_STEREO_DOWNMIX
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
#define AV_CH_LAYOUT_5POINT1_BACK
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Libavcodec external API header.
int sample_rate
samples per second
main external API structure.
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Describe the class of an AVClass context structure.
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
common internal api header.
int channels
number of audio channels
static int s302m_decode_frame(AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt)
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() for allocating buffers and supports custom allocators.