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e0136bc7f4
Add S5L8702 VPU-B initialization, reset, bitstream input, frame output, and cache maintenance to the iPod 6G target. Advertise it with HAVE_HW_H264 and append a capability-gated decoder interface to the plugin API. Keep MP4 parsing, AAC decode and mixer output, A/V synchronization, playback controls, resume state, and presentation in the multi-file h264_player plugin. The target layer exposes decoder operations only. Accept non-fragmented MP4/M4V containing Constrained Baseline H.264 through level 3.0, up to 640x480 at 30 fps, with optional AAC-LC audio. Validate codec configuration and all sample-table relationships before activating the hardware. Read MP4 tables in bulk, boost the CPU while preparing them, and report staged loading progress so long movies do not appear to hang during startup. Register the viewer and document its format limits and controls. The libm4a compatibility fixes needed by video-first containers remain in the preceding standalone change. Tested on an iPod Classic 6G through an isolated Rolo nightly runtime: H.264/AAC playback and M4V startup succeeded. Normal and isolated-runtime iPod 6G builds also complete, and git diff --check is clean. Change-Id: I1e96c65c7d0b4231a94f602f8052f1b26d6e4a80
84 lines
3.6 KiB
C
84 lines
3.6 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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*
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* Copyright (C) 2025-2026 David Cormier
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*
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* S5L8702 VPU-B H.264 Baseline hardware decoder.
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*
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* Drives the VPU-B block on iPod Classic 6G (S5L8702).
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* Full hardware decode: CAVLC, dequant, IDCT, intra/inter prediction,
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* motion compensation, and in-loop deblocking.
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*
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* Supports: H.264 Baseline profile, level <= 3.0, up to ten ordered slices
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* per frame. The single-slice path is proven bit-perfect against ffmpeg;
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* multi-slice support follows the same Apple VPU descriptor interface.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#ifndef VPU_H264_6G_H
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#define VPU_H264_6G_H
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#include "hw_h264.h"
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#include <stdint.h>
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#include <stddef.h>
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/* Returns minimum buffer size needed for given max dimensions.
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* Caller must provide a contiguous buffer of at least this size
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* to vpu_h264_open(). Accounts for alignment padding. */
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size_t vpu_h264_buf_size(int max_w, int max_h);
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/* Initialize decoder. Allocates internal buffers from buf via bump
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* allocator. Powers on VPU-B hardware and IRQ.
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* Returns context pointer (inside buf) or NULL on error. */
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struct vpu_h264 *vpu_h264_open(void *buf, size_t buf_size,
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int max_w, int max_h);
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/* Feed avcC decoder configuration (from MP4 container).
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* Parses SPS and PPS NALUs from the avcC blob.
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* Returns 0 on success, -1 on error. */
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int vpu_h264_configure(struct vpu_h264 *v,
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const uint8_t *avcc, int avcc_len);
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/* Feed one raw NALU (including nal_header byte, excluding length prefix).
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* Accepts EBSP (emulation prevention bytes intact).
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* Handles SPS (7), PPS (8), IDR slice (5), non-IDR slice (1) internally.
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* For slice NALUs: triggers synchronous HW decode (~5ms).
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*
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* Returns: 1 = frame decoded (call vpu_h264_get_frame)
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* 0 = NALU consumed (SPS/PPS/SEI, no frame output)
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* -1 = error (STATUS1 bits or timeout) */
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int vpu_h264_decode_nalu(struct vpu_h264 *v,
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const uint8_t *nalu, int nalu_len);
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/* Decode one length-prefixed AVC sample as a complete picture. All slices
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* are submitted together, matching the two-slice files produced by iTunes'
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* "Create iPod or iPhone Version" action. */
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int vpu_h264_decode_sample(struct vpu_h264 *v, const uint8_t *sample,
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int sample_len, int nalu_len_size);
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/* Get pointers to last decoded frame planes (YCbCr 4:2:0 planar).
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* Pointers are cached aliases; cache is already invalidated.
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* stride is the coded luma pitch; w/h are the cropped display dimensions.
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* Valid until the next decode call. */
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void vpu_h264_get_frame(const struct vpu_h264 *v,
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const uint8_t **y, const uint8_t **cb,
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const uint8_t **cr, int *w, int *h, int *stride);
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/* Shutdown decoder. Powers off VPU-B hardware. */
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void vpu_h264_close(struct vpu_h264 *v);
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#endif /* VPU_H264_6G_H */
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