diff options
Diffstat (limited to 'drivers/media/test-drivers/vidtv/vidtv_encoder.h')
| -rw-r--r-- | drivers/media/test-drivers/vidtv/vidtv_encoder.h | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/drivers/media/test-drivers/vidtv/vidtv_encoder.h b/drivers/media/test-drivers/vidtv/vidtv_encoder.h new file mode 100644 index 000000000..50e3cf4eb --- /dev/null +++ b/drivers/media/test-drivers/vidtv/vidtv_encoder.h @@ -0,0 +1,165 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Vidtv serves as a reference DVB driver and helps validate the existing APIs + * in the media subsystem. It can also aid developers working on userspace + * applications. + * + * This file contains a generic encoder type that can provide data for a stream + * + * Copyright (C) 2020 Daniel W. S. Almeida + */ + +#ifndef VIDTV_ENCODER_H +#define VIDTV_ENCODER_H + +#include <linux/types.h> + +enum vidtv_encoder_id { + /* add IDs here when implementing new encoders */ + S302M, +}; + +struct vidtv_access_unit { + u32 num_samples; + u64 pts; + u64 dts; + u32 nbytes; + u32 offset; + struct vidtv_access_unit *next; +}; + +/* Some musical notes, used by a tone generator. Values are in Hz */ +enum musical_notes { + NOTE_SILENT = 0, + + NOTE_C_2 = 65, + NOTE_CS_2 = 69, + NOTE_D_2 = 73, + NOTE_DS_2 = 78, + NOTE_E_2 = 82, + NOTE_F_2 = 87, + NOTE_FS_2 = 93, + NOTE_G_2 = 98, + NOTE_GS_2 = 104, + NOTE_A_2 = 110, + NOTE_AS_2 = 117, + NOTE_B_2 = 123, + NOTE_C_3 = 131, + NOTE_CS_3 = 139, + NOTE_D_3 = 147, + NOTE_DS_3 = 156, + NOTE_E_3 = 165, + NOTE_F_3 = 175, + NOTE_FS_3 = 185, + NOTE_G_3 = 196, + NOTE_GS_3 = 208, + NOTE_A_3 = 220, + NOTE_AS_3 = 233, + NOTE_B_3 = 247, + NOTE_C_4 = 262, + NOTE_CS_4 = 277, + NOTE_D_4 = 294, + NOTE_DS_4 = 311, + NOTE_E_4 = 330, + NOTE_F_4 = 349, + NOTE_FS_4 = 370, + NOTE_G_4 = 392, + NOTE_GS_4 = 415, + NOTE_A_4 = 440, + NOTE_AS_4 = 466, + NOTE_B_4 = 494, + NOTE_C_5 = 523, + NOTE_CS_5 = 554, + NOTE_D_5 = 587, + NOTE_DS_5 = 622, + NOTE_E_5 = 659, + NOTE_F_5 = 698, + NOTE_FS_5 = 740, + NOTE_G_5 = 784, + NOTE_GS_5 = 831, + NOTE_A_5 = 880, + NOTE_AS_5 = 932, + NOTE_B_5 = 988, + NOTE_C_6 = 1047, + NOTE_CS_6 = 1109, + NOTE_D_6 = 1175, + NOTE_DS_6 = 1245, + NOTE_E_6 = 1319, + NOTE_F_6 = 1397, + NOTE_FS_6 = 1480, + NOTE_G_6 = 1568, + NOTE_GS_6 = 1661, + NOTE_A_6 = 1760, + NOTE_AS_6 = 1865, + NOTE_B_6 = 1976, + NOTE_C_7 = 2093 +}; + +/** + * struct vidtv_encoder - A generic encoder type. + * @id: So we can cast to a concrete implementation when needed. + * @name: Usually the same as the stream name. + * @encoder_buf: The encoder internal buffer for the access units. + * @encoder_buf_sz: The encoder buffer size, in bytes + * @encoder_buf_offset: Our byte position in the encoder buffer. + * @sample_count: How many samples we have encoded in total. + * @access_units: encoder payload units, used for clock references + * @src_buf: The source of raw data to be encoded, encoder might set a + * default if null. + * @src_buf_sz: size of @src_buf. + * @src_buf_offset: Our position in the source buffer. + * @is_video_encoder: Whether this a video encoder (as opposed to audio) + * @ctx: Encoder-specific state. + * @stream_id: Examples: Audio streams (0xc0-0xdf), Video streams + * (0xe0-0xef). + * @es_pid: The TS PID to use for the elementary stream in this encoder. + * @encode: Prepare enough AUs for the given amount of time. + * @clear: Clear the encoder output. + * @sync: Attempt to synchronize with this encoder. + * @sampling_rate_hz: The sampling rate (or fps, if video) used. + * @last_sample_cb: Called when the encoder runs out of data.This is + * so the source can read data in a + * piecemeal fashion instead of having to + * provide it all at once. + * @destroy: Destroy this encoder, freeing allocated resources. + * @next: Next in the chain + */ +struct vidtv_encoder { + enum vidtv_encoder_id id; + char *name; + + u8 *encoder_buf; + u32 encoder_buf_sz; + u32 encoder_buf_offset; + + u64 sample_count; + + struct vidtv_access_unit *access_units; + + void *src_buf; + u32 src_buf_sz; + u32 src_buf_offset; + + bool is_video_encoder; + void *ctx; + + __be16 stream_id; + + __be16 es_pid; + + void *(*encode)(struct vidtv_encoder *e); + + u32 (*clear)(struct vidtv_encoder *e); + + struct vidtv_encoder *sync; + + u32 sampling_rate_hz; + + void (*last_sample_cb)(u32 sample_no); + + void (*destroy)(struct vidtv_encoder *e); + + struct vidtv_encoder *next; +}; + +#endif /* VIDTV_ENCODER_H */ |