blob: de1292ddd68f81e5d5f03e1abe6a16497381579d
| 1 | #ifndef AML_MPEG12_PARSER_H |
| 2 | #define AML_MPEG12_PARSER_H |
| 3 | |
| 4 | #include "../utils/pixfmt.h" |
| 5 | #include "../utils/common.h" |
| 6 | |
| 7 | /* Start codes. */ |
| 8 | #define SEQ_END_CODE 0x000001b7 |
| 9 | #define SEQ_START_CODE 0x000001b3 |
| 10 | #define GOP_START_CODE 0x000001b8 |
| 11 | #define PICTURE_START_CODE 0x00000100 |
| 12 | #define SLICE_MIN_START_CODE 0x00000101 |
| 13 | #define SLICE_MAX_START_CODE 0x000001af |
| 14 | #define EXT_START_CODE 0x000001b5 |
| 15 | #define USER_START_CODE 0x000001b2 |
| 16 | #define SLICE_START_CODE 0x000001b7 |
| 17 | |
| 18 | enum AVFieldOrder { |
| 19 | AV_FIELD_UNKNOWN, |
| 20 | AV_FIELD_PROGRESSIVE, |
| 21 | AV_FIELD_TT, //< Top coded_first, top displayed first |
| 22 | AV_FIELD_BB, //< Bottom coded first, bottom displayed first |
| 23 | AV_FIELD_TB, //< Top coded first, bottom displayed first |
| 24 | AV_FIELD_BT, //< Bottom coded first, top displayed first |
| 25 | }; |
| 26 | |
| 27 | struct MpvParseContext { |
| 28 | struct AVRational frame_rate; |
| 29 | int progressive_sequence; |
| 30 | int width, height; |
| 31 | |
| 32 | int repeat_pict; /* XXX: Put it back in AVCodecContext. */ |
| 33 | int pict_type; /* XXX: Put it back in AVCodecContext. */ |
| 34 | enum AVFieldOrder field_order; |
| 35 | int format; |
| 36 | /** |
| 37 | * Dimensions of the coded video. |
| 38 | */ |
| 39 | int coded_width; |
| 40 | int coded_height; |
| 41 | /** |
| 42 | * For some codecs, the time base is closer to the field rate than the frame rate. |
| 43 | * Most notably, H.264 and MPEG-2 specify time_base as half of frame duration |
| 44 | * if no telecine is used ... |
| 45 | * |
| 46 | * Set to time_base ticks per frame. Default 1, e.g., H.264/MPEG-2 set it to 2. |
| 47 | */ |
| 48 | int ticks_per_frame; |
| 49 | /** |
| 50 | * Size of the frame reordering buffer in the decoder. |
| 51 | * For MPEG-2 it is 1 IPB or 0 low delay IP. |
| 52 | * - encoding: Set by libavcodec. |
| 53 | * - decoding: Set by libavcodec. |
| 54 | */ |
| 55 | int has_b_frames; |
| 56 | /** |
| 57 | * - decoding: For codecs that store a framerate value in the compressed |
| 58 | * bitstream, the decoder may export it here. { 0, 1} when |
| 59 | * unknown. |
| 60 | * - encoding: May be used to signal the framerate of CFR content to an |
| 61 | * encoder. |
| 62 | */ |
| 63 | struct AVRational framerate; |
| 64 | }; |
| 65 | |
| 66 | struct mpeg12_param_sets { |
| 67 | bool head_parsed; |
| 68 | /* currently active parameter sets */ |
| 69 | struct MpvParseContext dec_ps; |
| 70 | }; |
| 71 | |
| 72 | int mpeg12_decode_extradata_ps(u8 *buf, int size, struct mpeg12_param_sets *ps); |
| 73 | |
| 74 | #endif |
| 75 |